refactor: rename 'recit' to 'narrative' for English code naming

- Rename store: recit.js → narrative.js (useRecitStore → useNarrativeStore)
- Rename templates: recit.php/json.php → narrative.php/json.php
- Rename blueprint: recit.yml → narrative.yml
- Update all imports and references in Vue/JS files
- Update PHP template references and data attributes
- Update CLAUDE.md documentation
- Create comprehensive README.md with English-French dictionary

The dictionary section maps English code terms to French content terms
for easier navigation between codebase and CMS content.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

public/site/blueprints/pages/narrative.yml

@@ -1,4 +1,4 @@
-title: Récit
+title: Narrative
 
 columns:
   main:

public/site/blueprints/pages/projet.yml

@@ -17,9 +17,9 @@ columns:
             multiple: false
             width: 1/2
       pages:
-        label: Récits
+        label: Narratives
         type: pages
-        template: recit
+        template: narrative
   sidebar:
     width: 1/3
     sections: