docs: documentazione MkDocs completa + fix build + verifica OpenCV dinamica

- Aggiunti docs/ (9 pagine MkDocs, tema Material) + mkdocs.yml
- Fix mkdocs.yml: repo_url -> git.enne2.net, tasklist (era taskbuttons),
  fence Mermaid via helper locale mermaid_fence.py (def_fence_mermaid
  rimosso da pymdown-extensions moderne)
- Documentate le nuove funzionalità: agy_create_verified (generazione
  verificata con verifica OpenCV DINAMICA generata dall'LLM), workflow
  vocale a 2 fasi (vocalPlanningMode), chiavi config context/webSearch
- tools.md ora documenta 14 tool; vocal-workflow.md include l'overlay di
  conferma piano; configuration.md include vocalPlanningMode
- .gitignore: esclusi site/ e __pycache__/
- Build MkDocs verificata (site/ generato correttamente)

mkdocs.yml

@@ -0,0 +1,62 @@
+site_name: agy-pi Documentation
+site_description: Documentazione ufficiale dell'estensione agy-pi per pi coding agent
+site_author: agy-pi team
+repo_url: https://git.enne2.net/enne2/agy-pi
+
+theme:
+  name: material
+  language: it
+  palette:
+    - media: "(prefers-color-scheme: dark)"
+      scheme: slate
+      primary: indigo
+      accent: cyan
+      toggle:
+        icon: material/brightness-4
+        name: Passa alla modalità chiara
+    - media: "(prefers-color-scheme: light)"
+      scheme: default
+      primary: indigo
+      accent: cyan
+      toggle:
+        icon: material/brightness-7
+        name: Passa alla modalità scura
+  features:
+    - navigation.tabs
+    - navigation.sections
+    - navigation.top
+    - navigation.expand
+    - search.suggest
+    - search.highlight
+    - content.code.copy
+    - content.code.annotate
+
+markdown_extensions:
+  - admonition
+  - pymdownx.details
+  - pymdownx.superfences:
+      custom_fences:
+        - name: mermaid
+          class: mermaid
+          format: !!python/name:mermaid_fence.def_fence_mermaid
+  - pymdownx.highlight:
+      anchor_linenums: true
+  - pymdownx.inlinehilite
+  - pymdownx.snippets
+  - pymdownx.tabbed:
+      alternate_style: true
+  - pymdownx.tasklist
+  - tables
+  - attr_list
+  - md_in_html
+
+nav:
+  - Home: index.md
+  - Architettura: architecture.md
+  - Strumenti (Tools): tools.md
+  - Comandi & Keybindings: commands-keybindings.md
+  - Configurazione: configuration.md
+  - Workflow Vocale (F12): vocal-workflow.md
+  - Context Injection: context-injection.md
+  - Wrapper CLI: cli-wrapper.md
+  - Troubleshooting: troubleshooting.md