Create style guide for FedRAMP OSCAL Constraints (#760)

* Remove FedRAMP namespace from 'data-center' props (#795)

* Hotfix/info (#780)

* fix informational constraint handling and make ssp-all valid correct

* revert external constraint changes

* Update fedramp-external-constraints.xml

* Update fedramp_extensions_steps.ts

* update info handling

* Update fedramp-external-constraints.xml

Co-authored-by: Gabeblis <[email protected]>

* Update fedramp-external-constraints.xml

Co-authored-by: Gabeblis <[email protected]>

* Update fedramp-external-constraints.xml

Co-authored-by: Gabeblis <[email protected]>

* Update fedramp-external-constraints.xml

Co-authored-by: Gabeblis <[email protected]>

* Update src/validations/constraints/fedramp-external-constraints.xml

Co-authored-by: Gabeblis <[email protected]>

* Update src/validations/constraints/fedramp-external-constraints.xml

Co-authored-by: Gabeblis <[email protected]>

* Update dev-constraint.js

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Co-authored-by: Gabeblis <[email protected]>

* [skip ci] Create style guide doc for #675

* [skip ci] FSCR-1 re external constraints for #675

* [skip ci] FCSR-1, woops, need formal name for #675

* [skip ci] Tweak FCSR-1 anchor ID in #675

* [skip ci] Stop header hacks for IDs in #675

I read more about these techniques than I would like, but none of them
appear to work effectively for making anchors like `#fcsr-1` without
adding other content to the anchor which I would like to avoid.

https://gist.github.com/asabaylus/3071099?permalink_comment_id=3895584

Either it never worked or something changed. Oh well!

* [skip ci] Add FCSR-2 on context sorting for #675

* [skip ci] Add FCSR-3 about alpha sorting for #675

* [skip ci] Add FCSR-4 to require help-url for #675

* [skip ci] Adjust title from style guide to dev style guide per Rene's review

* [skip ci] Adjust grammar and style per Rene's review

Co-authored-by: Rene Tshiteya <[email protected]>

* [skip ci] @Rene2mt's feedback: add ID req for #675

* [skip ci] @Rene2mt's feedback: level req for #675

* [skip ci] @Rene2mt's review: why CRITICAL for #675

* [skip ci] Woops, missed IDs for reqs for #675

* [skip ci] Feedback: add message req for #675

* [skip ci] Fix constraint path in examples for #675

* [skip ci] Add remarks rec guidance for #675

* [skip ci] Add @wandmagic's rec for FCSR-1 for #675

* [skip ci] Add FCSR-10 re active voice for #675

* [skip ci] Remove FCSR-10's incorrect only for #675

* [skip ci] Add FCSR-11 about BCP14 words for #675

* [skip ci] Add no-jargon req FCSR-12 for #675

* [skip ci] Item, not sequence style req for #675

* [skip ci] Add req for sequence ctx hints for #675

* [skip ci] Add FCSR-15 re formal-names for #675

* [skip ci] Remove anchor hack from FCSR-1 for #675

* [skip ci] Wrap up kebab case IDs, reorder for #675

* [skip ci] Fixes from @Rene2mt'2 review for #675

* [skip ci] Add labels for rules in #675

* [skip ci] Simplify rule titles for #675

Follow feedback from @brian-ruf in his review.

* [skip ci] Finalize table index with reqs for #645

* [skip ci] Limit informational constraints for #675

* [skip ci] Feedback: FRR1 about OSCAL constraints, not Metaschema constraints

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Update FRR1 in table listing too

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Add space in status row of table for FRR2

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Add missing word to FRR3 title

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Improve the prose in FRR2 guidance

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Reorder statements in sentence of FRR2 guidance

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Clarify ambiguous wording in FRR5

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Correct typos in FRR6 formal name

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Make FRR7 formal name more explicit

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Improve FRR8 formal name

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Fix FRR8 formal name in table index

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Fix FRR9 formal name in table index

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Fix FRR9 formal name in table index

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Adjust FRR9 guidance to specify expect constraints

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Adjust FRR9 constraint examples for correct type

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Adjust FRR10 formal name to be more clear

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Fix FRR10 formal name in table index

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Make FRR11 formal name better sentence fragment

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Fix FRR11 above requirement text

Co-authored-by: David Waltermire <[email protected]>

* [skip ci] Adjust FedRAMP reqs prefix FCSR->FRR

Given related work in the program, I want to generalize the prefix to be
more general and global for all form of FedRAMP requirements down the
road.

* [skip ci] Add missing examples to FRR17 for #675

* [skip ci] Align formal names, spacing for #675

I had to fix up some of the formal names where Dave covered some of them
in many places, but not all. Also other suggestions add some space.

* [skip ci] Add level to many examples, finish #675

* [skip ci] Fold longer bg info for reqs in #675

* [skip ci] Clarify FRR1 bad example is bad in #645

* [skip ci] Clarify context order examples for #675

* [skip ci] Clarify case sorting for FRR3 in #675

* [skip ci] Clean up explanation of FRR10 for #675

* [skip ci] Fix typos in FRR13 and FRR15 for #675

* [skip ci] FRR2 feedback from Kylie for #675

* [skip ci] Reword FRR9 with Kylie's feedback in #675

* [skip ci] Woops, FRR16 twice, no FRR17 for #675

* [skip ci] Last call and let reqs in FRR18 for #675

* [skip ci] Correct ID for FRR18 to anchor in table

Co-authored-by: Gabeblis <[email protected]>

* [skip ci] Offset req ID sequence

Per discussion with others on a call with leads and staff from both FR
branches, begin with an offset sequences and reserve the first 100 for
other uses for the time being.

/cc @kscarf1

* [skip ci] BCP14 keywords in #675 summary text

* [skip ci] Tighten up summary text more for #675

* [skip ci] Add back to top anchors for #675

* [skip ci] Better grammar and flow for #675 summary

* [skip ci] Improve FRR102 guidance text for #675

* [skip ci] Capitalize and fix FRR110 title for #675

* [skip ci] Fix poor grammar in FRR117 text for #675

* [skip ci] Explicit docs URL in FRR104 for #675

Address missing feedback to @kyhu65867 from review that had not been
previously addressed by yours truly.

* [skip ci] Fix FRR105 with feedback for #675

Address some feedback about wording and style  of the unique ID req.

* [skip ci] Fix FRR103 spacing for #675

Completely address feedback from @david-waltermire after checking for
final review of style guide left in the comment below.

#760 (comment)

* [skip ci] Fix FRR108 conformant example for #675

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Co-authored-by: Rene Tshiteya <[email protected]>
Co-authored-by: wandmagic <[email protected]>
Co-authored-by: Gabeblis <[email protected]>
Co-authored-by: David Waltermire <[email protected]>