Track clean-main PocketJS naming cleanup

[doodlewind]

Context

The naming cleanup was previously mixed into the renderer experiment branch. It should be tracked independently from a clean main base so the renderer investigation remains separate.

Scope

• Move the public frame hook module from psp-ui/hooks to psp-ui/lifecycle.
• Rename app-facing lifecycle APIs:
  • useFrame -> onFrame
  • useButtonPress -> onButtonPress
  • useSpriteAnimation -> createSpriteAnimation
• Update demos, docs, and tests to use lifecycle callback names.
• Add app-facing @pocketjs/* import aliases while preserving existing internal psp-ui package/build identity.

Non-goals

• Do not include the React/Vue renderer experiment.
• Do not rename internal package metadata, PSP packaging names, or existing psp-ui build/error prefixes in this cleanup.

Draft PR

• refactor: rename public hooks and imports for PocketJS #7

Validation Captured In The PR

• All demos compile: cards hero launcher library music notifications settings stats.
• bun run test passes.
• bunx tsc --noEmit passes.