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/recit.yml

@@ -1,36 +0,0 @@
-title: Récit
-
-columns:
-  main:
-    width: 2/3
-    sections:
-      fields:
-        type: fields
-        fields:
-          blueprint:
-            type: headline
-            label: Page "{{ page.intendedTemplate }}"
-          author:
-            label: Auteur·ice(s)
-            type: text
-            width: 1/2
-          cover:
-            label: Image de couverture
-            type: files
-            multiple: false
-            width: 1/2
-          introduction:
-            label: Introduction
-            type: writer
-      pages:
-        label: Pages
-        type: pages
-        template:
-          - carte
-          - geoformat
-  sidebar:
-    width: 1/3
-    sections:
-      files:
-        label: Fichiers
-        type: files