chore: update changelog for 0.0.19

[gmegidish]

Update CHANGELOG.md with the 0.0.19 release entry.

• Refactor: Split H264 streaming code out into a separate repository (refactor: splitting devicekit-ios into h264 repository #47, refactor: devicekit h264 goes to another repo #46)
• Test: Migrate test suite from Mocha to Playwright (test: moved tests from mocha to playwright #49)

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Configuration used: Organization UI

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Run ID: 42c91810-a9d3-43c5-ac10-418b09933bfb

📥 Commits

Reviewing files that changed from the base of the PR and between 2c57d03 and 87bb760.

📒 Files selected for processing (1)

• CHANGELOG.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/changelog-0.0.19

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