chore(release): prepare v0.2.2

[lucasli1015]

Summary

• bump all BrainPilot workspaces and internal dependency ranges to 0.2.2
• document the hosted plugin-availability UX fix in the changelog, release notes, and bilingual README/docs
• update npm installation and official CPU/GPU image references to 0.2.2

Release scope

This is a focused Cloud UX patch. Hosted builds show that plugins are not yet available instead of issuing unsupported marketplace requests. Local and self-hosted plugin marketplaces are unchanged.

Validation

• npm ci
• npm run version:check
• npm run typecheck
• npm test: 99 files, 1,112 tests
• npm run build
• VITE_LOCAL_MODE=0 npm run build -w @brainpilot/web
• npm run docs:check
• npm audit --omit=dev: 0 vulnerabilities
• npm run release:dry
• git diff --check

Depends on merged fix #537.

[HaoxuanLiTHUAI]

Reviewed the 0.2.2 release delta against merged #537. The version graph is aligned across all workspaces, the bilingual changelog/README/docs describe the hosted availability boundary accurately, and the fixed-version test assertion matches the release metadata. Local release gates and required CI are green.