feat(ohpm): add OHPM registry adapter

[hu-qi]

Summary

Closes #1715.

Adds OpenHarmony OHPM registry support backed by the public SPA JSON endpoints:

• ohpm search <query> for package search
• ohpm package <name> for package metadata
• ohpm dependents <name> for reverse dependency rows
• ohpm keywords for hot search terms

Details

• Replaces the earlier browser-driven OHPM search fallback with direct public API calls.
• Adds shared OHPM validation/fetch helpers with typed OpenCLI errors.
• Handles OHPM detail responses that omit package descriptions by falling back to exact search metadata for latest package lookups.
• Regenerates cli-manifest.json for the new commands.
• Adds adapter tests covering argument validation, sort aliases, response mapping, error handling, description fallback, dependents, and keywords.

Validation

• npm run build-manifest
• npx vitest run --project adapter clis/ohpm/ohpm.test.js
• npm run check:silent-column-drop
• npm run check:typed-error-lint
• npm run typecheck
• npm run docs:build
• node dist/src/main.js ohpm search axios --limit 3 --format json
• node dist/src/main.js ohpm package @ohos/axios --format json
• node dist/src/main.js ohpm keywords --format json
• node dist/src/main.js ohpm dependents @ohos/axios --limit 3 --format json