Release 4.0.5: Update plugin description and dependencies

[knowledgecode]

Summary

• Update plugin system description in documentation to focus on extensibility rather than specific examples
• Version bump to 4.0.5 with dependency updates

Changes

• docs/index.md: Improved plugin system description to highlight formatter/parser extension capability
• package.json: Version bump from 4.0.4 to 4.0.5
• package-lock.json: Updated dependencies including eslint, rollup, typescript-eslint, and @types/node

Test plan

• Verify documentation renders correctly
• Ensure all existing tests pass
• Confirm build process works with updated dependencies