CMake Improvements

Snapshot

Enhanced Features: Snapshot Manager + MP4 Muxer

[StepSecurity] ci: Harden GitHub Actions

[StepSecurity] ci: Harden GitHub Actions

Adding libssl-dev as dependency in README.md

Update handling of Quantization Table header for Motion JPEG

[BUGFIX #299] Do not exit thread upon EAGAIN error when fetching frames

Implement compression classes with MP3 encoding as the first one