Refactor urns package

[rowanseymour]

Trying to...

1. Fix URN Normalization needs to be idempotent #85
2. Simplify the API (don't have a bunch of type specific things)
3. For phone numbers.. only do conversion to an international number at parse time and not in Normalize because only at parse time do we typically have the right country code.
4. Enforce max length of 255 across all schemes

[rowanseymour]

we only created constructors for some schemes.. and we don't need them

[norkans7]

Those were used in courier but we can update courier to use NewURNFromParts

[norkans7]

Or as it is most common to not have a query and display for the URN can we have a short cut that we pass the scheme type and the path and that set the query and display to ""?

[rowanseymour]

Have added that as urns.New(scheme, path)

[codecov]

Codecov Report

Attention: Patch coverage is 96.12403% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 89.81%. Comparing base (64e21d5) to head (cd756a1).
Report is 1 commits behind head on main.

Files	Patch %	Lines
urns/urns.go	84.84%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #119      +/-   ##
==========================================
- Coverage   90.35%   89.81%   -0.55%     
==========================================
  Files          41       42       +1     
  Lines        1991     1954      -37     
==========================================
- Hits         1799     1755      -44     
- Misses        154      160       +6     
- Partials       38       39       +1     

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[norkans7]

Looks good, we could also update the go version to 1.22