Fix hooks package type export paths

[Gujiassh]

Summary

• replace the broken .d.js subpath types entries in @claude-flow/hooks/package.json with the .d.ts files the package actually emits
• keep the fix scoped to package metadata; no runtime hook logic changes
• ensure downstream TypeScript consumers can resolve hook package subpath declarations consistently

Validation

• cd v3/@claude-flow/hooks && npm run build
• static post-build check confirmed every exports[*].types target now exists on disk

Notes

• this PR is independent from the open plugins, performance, and OpenSandbox lines; it only fixes package metadata in @claude-flow/hooks

[xkonjin]

Straightforward typo fix. The .d.js extension is clearly wrong - TypeScript declaration files should use .d.ts.

This is a critical fix because broken type exports would cause TypeScript consumers to fall back to any types, negating the type safety benefits of using this package.

No issues found. All export paths are correctly updated.