Add seektoliveoffset attribute

[k-g-a]

1. Implements Add seekToLiveOffset attribute #923, adds documentation (with motivation).
2. Fixes a regression of noautoseektolive not being used at all
3. Fixes a couple of broken links in docs.

[vercel]

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[luwes]

thank you for the contribution! I'll bring this up with the team.

[codecov]

Codecov Report

Attention: Patch coverage is 57.40741% with 23 lines in your changes missing coverage. Please review.

Project coverage is 78.94%. Comparing base (3ea80df) to head (3ba89cd).
Report is 110 commits behind head on main.

Files with missing lines	Patch %	Lines
src/js/media-controller.ts	29.62%	19 Missing ⚠️
src/js/media-store/request-map.ts	73.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #958      +/-   ##
==========================================
+ Coverage   78.55%   78.94%   +0.38%     
==========================================
  Files          59       50       -9     
  Lines       11080    12101    +1021     
  Branches        0      771     +771     
==========================================
+ Hits         8704     9553     +849     
- Misses       2376     2548     +172     

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[k-g-a]

Hi, @luwes!

I'd like to fix the coverage issue of this PR, but, unfortunatelly, I could not find any examples of working with live streams in test cases. So I'm open to ideas/suggestions to implement.