Prepare PointerGestureKit 0.2.0

[naviapis]

Summary

• prepare the public package contract and release metadata for PointerGestureKit 0.2.0
• restructure recognizer observation, session, replay, and cleanup responsibilities
• add explicit empty-matcher pass-through policy, drag-start replay, validated tuning, and auxiliary-button naming
• align repository automation, documentation, public API tests, and source-boundary tests with sibling packages
• make event tap, recognizer, and observation-token teardown safe on Swift 6.2.4 without changing their public behavior

Developer impact

This is a pre-1.0 breaking release. Hosts must adopt the renamed and narrowed public APIs documented in the changelog, including buttonMoved, auxiliaryButtonID, the updated configuration and tuning initializers, main-actor event sources, and the removed catalog/convenience contracts.

The package now requires Swift 6.2. Lifetime cleanup uses non-generic internal owners and narrow Sendable bridges because Swift 6.2.4 aborts when these public and internal types use actor-isolated deinitializers.

Validation

• make check
• Debug and Release builds with complete strict concurrency and warnings as errors
• 246 tests
• GitHub Actions on Xcode 26.3 / Swift 6.2.4
• swift package diagnose-api-breaking-changes 0.1.0 (expected 0.2.0 breaking-contract report reviewed)