refactor: define HTML media interfaces locally

[jderochervlk]

Tracking issue: #342

Summary

• define the shared HTML media-element record in DomHTMLMediaElement
• move audio, video, track, time-range, and text-track types beside their APIs
• add the public MediaError and VideoPlaybackQuality modules
• update media bindings to use the locally owned types

Temporary state

• the equivalent aggregate media definitions remain in DOM/DomTypes during this layer
• refactor: remove DOM compatibility types #310 removes those copies once the remaining consumers have migrated
• the current physical placement under the broad DOM folder is temporary; the follow-up Option 5 stack separates HTML and Media folder features

Review focus

• inheritance and shared fields in DomHTMLMediaElement
• video callback, playback-quality, track, and error signatures

Verification

• npm run build
• npm test
• npm run format:check

[jderochervlk]

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[chatgpt-codex-connector]

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