* release: bump version to v0.3.0, update dashboard GIF
New features in v0.3.0:
- Go module proxy (GOPROXY protocol) with caching
- Go in dashboard UI (sidebar, list, detail pages)
- Compact registry cards (6 in one row)
- Updated icons (Cargo crate, Go text mark)
- .gitleaks.toml restored
* security: update .gitignore and remove stale files
* security: update .gitignore to block dev tooling and process files
- Move badges from top to Security & Trust section
- Add dashboard GIF (EN/RU crossfade) as first visual
- Add "Why NORA" section with key differentiators
- Add "Used by" production reference
- Add binary install option
- Add Supported Registries table with mount points
- Streamline features into scannable list
- Remove emoji from footer
- Add comparison link placeholder
