test: broaden Compose reference claim coverage

[aldefy]

Summary

• extend kotlin verify assertions beyond width/height to include visible text and click-action semantics
• add executable Compose UI tests across theming, lists, accessibility, composition locals, state, and animation references
• raise generated claim tests from 2 to 8 while keeping fragment examples opt-in only

New generated tests

• animated-visibility-renders-visible-content
• remember-counter-renders-clickable-state
• padding-before-size-adds-to-footprint
• size-before-padding-keeps-footprint
• material-theme-provides-tokens
• composition-local-provider-overrides-default
• button-text-exposes-click-action
• lazy-column-count-renders-visible-items

Verification

• ./gradlew :verify-claims:testDebugUnitTest --no-daemon emitted 8 claim tests, all green
• ./gradlew -p buildSrc test
• bash scripts/check-versions.sh v2.4.0
• bash scripts/check-description-length.sh
• bash scripts/validate-plugin-manifest.sh
• bats scripts/check-versions.bats scripts/validate-plugin-manifest.bats