chore: rename project from idfoto to relicario

Sweeping rename across crates, CLI binary, WASM bindings, extension, docs,
and vault metadata paths. Git remote updated to relicario.git.

- crates/idfoto-{core,cli,wasm} -> crates/relicario-{core,cli,wasm}
- IdfotoError -> RelicarioError
- IDFOTO_IMAGE env var -> RELICARIO_IMAGE
- ~/.config/idfoto -> ~/.config/relicario
- .idfoto/ vault metadata dir -> .relicario/ (breaking; pre-release)
- Binary name idfoto -> relicario
- Extension wasm module idfoto_wasm -> relicario_wasm
- Storage key idfotoSettings -> relicarioSettings
- All doc filenames and content references updated

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extension/webpack.config.js

@@ -27,8 +27,8 @@ module.exports = {
         { from: 'src/popup/styles.css', to: 'styles.css' },
         { from: 'setup.html', to: '.' },
         { from: 'icons', to: 'icons' },
-        { from: 'wasm/idfoto_wasm_bg.wasm', to: '.' },
-        { from: 'wasm/idfoto_wasm.js', to: '.' },
+        { from: 'wasm/relicario_wasm_bg.wasm', to: '.' },
+        { from: 'wasm/relicario_wasm.js', to: '.' },
       ],
     }),
   ],