* update e2e mock data to remove deprecated fields
* remove scream audio label
scream was never mapped to anything in frigate's custom labelmap, yell is used everywhere
* document common audio labels
* deprecate ffmpeg 5
* language tweak
* add field message to recommend presets instead of manual hwaccel args
* add guidance to docs on choosing a detect fps
* basic e2e frontend test framework
* improve mock data generation and add test cases
* more cases
* add e2e tests to PR template
* don't generate mock data in PR CI
* satisfy codeql check
* fix flaky system page tab tests by guarding against crashes from incomplete mock stats
* reduce local test runs to 4 workers to match CI