Port some features from my previous rewrite

[EliteMasterEric]

This includes:

• New FlxVideoState and FlxCutsceneState
  • The former provides a convenient and bug-free interface to create an FlxState which plays a video.
  • The latter provides a convenient and bug-free interface to move to a new state, play a video, then move back to a new state of your choice.
• Callback handler class (which uses FlxTypedSignal if Fixel is available and a custom implementation otherwise), to allow for multiple callback functions on one signal without breaking things when one user overrides a callback that is being used already.
  • I tried my best to make this change backwards compatible but it may break code in some cases.
• Added additional callbacks:
  • onOpening
  • onPlaying
  • onPaused
  • onStopped
  • onEndReached
  • onEncounteredError
  • onForward
  • onBackward
• Added the IVideoPlayer interface, to ensure that all video playback classes have the same functions available.
• Added additional sample projects

This PR supercedes #241 , which was based on LibVLC 4.0 and had many stability issues.

[MAJigsaw77]

Looks good, how does it run performance-wise?

It's still in development as there's some stuff missing for now, like asynchonously parse and working logging

[EliteMasterEric]

I would like to end up closing this PR and establishing a system where the develop branch is used for bleeding edge/development builds, and main always contains the source for latest stable release.

Performance seems comparable overall to older versions, Rapper GF's performance PR will probably help a lot. I need to do a proper review of those changes myself.

[polybiusproxy]

I would like to end up closing this PR and establishing a system where the develop branch is used for bleeding edge/development builds, and main always contains the source for latest stable release.

Performance seems comparable overall to older versions, Rapper GF's performance PR will probably help a lot. I need to do a proper review of those changes myself.

Sounds good! 👍

[EliteMasterEric]

Closing this since develop is now the active development branch. We'll fast-foward main once we are ready to publish the next release.