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/src/shared/messages.ts

@@ -23,7 +23,7 @@ export type Request =
   | { type: 'check_credential'; url: string; username: string; password: string }
   | { type: 'blacklist_site'; hostname: string }
   | { type: 'get_settings' }
-  | { type: 'update_settings'; settings: Partial<import('./types').IdfotoSettings> }
+  | { type: 'update_settings'; settings: Partial<import('./types').RelicarioSettings> }
   | { type: 'get_blacklist' }
   | { type: 'remove_blacklist'; hostname: string };