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/popup/components/unlock.ts

@@ -8,8 +8,8 @@ export function renderUnlock(app: HTMLElement): void {
 
   app.innerHTML = `
     <div class="pad" style="text-align:center; padding-top:40px;">
-      <img class="brand-logo" src="icons/idfoto-logo.svg" alt="">
-      <div class="brand">idfoto</div>
+      <img class="brand-logo" src="icons/relicario-logo.svg" alt="">
+      <div class="brand">relicario</div>
       <p class="muted" style="margin:8px 0 24px;">two-factor vault</p>
       <div class="form-group">
         <input