Add setting to disable touch swipe miniplayer

[eldenizfamilyanskicode]

Closes #4127.

Summary

• Add a Player setting to disable touch swipe-to-mini-player behavior.
• Install an idempotent touch/pointer guard when the setting is enabled.
• Stop downward drags that start on the player video surface before YouTube can route the watch page to home/miniplayer.
• Ignore player controls so normal controls remain usable.
• Add English locale text and unit coverage for the wiring plus simulated touch-drag behavior.

Validation

• npm ci
• npm test -- --runInBand
• npm run lint

Note: I do not have a Windows touchscreen tablet available, so the regression coverage uses synthetic touch events for the affected gesture path.

[nkinnan]

I will test this PR tomorrow. Thanks for implementing this!