feat: support external colour conversions in uploadStill and uploadClip api

[Julusian]

About the Contributor

This pull request is posted on behalf of the myself.

Type of Contribution

This is a Feature

Current Behavior

When uploading a clip or still to the ATEM, this library is assuming the input to be rgba encoded, and is converting it to the required YUVA422 in js. This is not very efficient, and can be rather limiting.

New Behavior

This exposes more detailed types in the api, to allow for doing this colour conversion externally.

Testing Instructions

Other Information

This replaces https://github.com/nrkno/sofie-atem-connection/pull/152, following the feedback received there, and feedback 2023-10-06 dev meeting.

See that PR for details on why this may want to be done externally.

Status

• [x] PR is ready to be reviewed.
• [ ] The functionality has been tested by the author.
• [ ] Relevant unit tests has been added / updated.
• [ ] Relevant documentation (code comments, system documentation) has been added / updated.

[codecov-commenter]

Codecov Report

Attention: 25 lines in your changes are missing coverage. Please review.

Comparison is base (672e871) 86.38% compared to head (b44aac3) 86.12%.

Files	Patch %	Lines
src/dataTransfer/dataTransferUploadBuffer.ts	5.88%	14 Missing and 2 partials :warning:
src/atem.ts	10.00%	5 Missing and 4 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #160 +/- ## ========================================== - Coverage 86.38% 86.12% -0.26% ========================================== Files 181 181 Lines 5855 5868 +13 Branches 966 971 +5 ========================================== - Hits 5058 5054 -4 - Misses 775 790 +15 - Partials 22 24 +2 ```

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