feat: Add experimental support for ManagedMediaSource

[mister-ben]

Adds basic support for ManagedMediaSource. Must be enabled with the useManagedMediaSource VHS option.

Does not implement an alternate AirPlay source - this requires a more significant change, to add two source els. This means remote playback has to be disabled on the video el when using MMS.

Event listeners for advanced control are not yet implemented - startstreaming, endstreaming, qualitychange

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.36%. Comparing base (dba1b79) to head (f700a8e).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/videojs-http-streaming.js	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1453      +/-   ##
==========================================
- Coverage   86.36%   86.36%   -0.01%     
==========================================
  Files          43       43              
  Lines       11144    11151       +7     
  Branches     2545     2548       +3     
==========================================
+ Hits         9625     9631       +6     
- Misses       1519     1520       +1     

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[mister-ben]

Adding as <source> children instead of the src attribute could be done here. We would need to ensure both the attribute and <source> children are removed on source changes, including to or from non-VHS sources. Also, will anything else expect the src attribute to be present?

[snowinszu]

Hi, any news?