Replace TypeDoc documentation with MkDocs

[SirEdvin]

Summary

• replace the TypeDoc renderer and plugin with MkDocs Material
• extract peripheral types, direct and inherited methods, overloads, parameters, returns, and errors through the TypeScript compiler API
• preserve versioned Pages deployment across mixed MkDocs and legacy TypeDoc refs
• stage Minecraft peripheral textures into generated documentation and add responsive Material styling

Verification

• ./gradlew :typed-peripheral-digitalitems:compileTypeScript :typed-peripheral-digitalitems:generateDocs --no-daemon
• ./gradlew :typescript-tests:compileTestLua --no-daemon
• node --test .github/scripts/docs-site.test.mjs projects/typed-peripheral-digitalitems/documentation/generate-docs.test.mjs
• assembled and validated a versioned preview with .github/scripts/docs-site.mjs