Expand the site around learning and product paths

[onatozmenn]

Summary

• broaden the homepage from one review story into Deed's real principles, use cases, local toolchain, learning routes, and public project record
• add a version-pinned Learn page and a consistent global navigation across all site pages
• carry Deed's existing mono/bracket/receipt language into compact tool rows, route ledgers, and a useful project footer without adding dependencies or third-party requests
• contain narrow-screen tables and footer links so every page remains readable at 320px

The information architecture takes cues from established language sites, while the interaction details stay specific to Deed: the existing compiler-backed diff receipt remains the hero proof, and the new status rows describe commands the released binary actually has. No production logos, funding, governance, or community claims were invented.

Validation

• node tools/check.mjs: 78 files, every link resolves, and v0.2.13 loaded and answered about all 29 examples
• VS Code diagnostics: no errors
• Playwright: all 7 routes at 1024x768 and 320x568 have no page overflow or JavaScript page errors
• visual checks: homepage and Learn page in light/dark at 1440x900, 390x844, and 320x568
• compiler-backed homepage receipt still matches Store.write, proven -> guarded, and the blocked decision from the pinned WASM artifact