docs: add wiki, complete lib nav, and rebuild mcp artifacts

- Add hand-written wiki (index, overview, how-to, extending, dev) with
  MkDocs config following the platform anatomy
- Complete the library nav by registering the csv and xlsx groups in
  docforge.nav.yml and docs/mkdocs.lib.yml
- Regenerate lib/MCP outputs with the rebuilt nav

docs/mkdocs.wiki.yml

@@ -0,0 +1,69 @@
+site_name: OmniRead Documentation
+docs_dir: wiki
+site_dir: ../site/wiki
+
+nav:
+- Home: index.md
+- Overview: 01_overview.md
+- How to Use: 02_how_to_use.md
+- Extending OmniRead: 03_extending.md
+- Development: 04_development.md
+
+theme:
+  name: material
+  palette:
+    scheme: slate
+    primary: blue grey
+    accent: teal
+  font:
+    text: Roboto
+    code: JetBrains Mono
+  features:
+  - navigation.sections
+  - navigation.expand
+  - navigation.top
+  - navigation.instant
+  - navigation.tracking
+  - navigation.indexes
+  - content.code.copy
+  - content.code.annotate
+  - content.tabs.link
+  - content.action.edit
+  - search.highlight
+  - search.share
+  - search.suggest
+  - navigation.tabs
+  - toc.integrate
+  - header.autohide
+  - announce.dismiss
+  - footer.social
+  - content.code.select
+  - content.code.line_numbers
+  - content.tooltips
+  icon:
+    logo: material/book-open-page-variant
+    repo: fontawesome/brands/github
+markdown_extensions:
+- pymdownx.superfences
+- pymdownx.inlinehilite
+- pymdownx.snippets
+- admonition
+- pymdownx.details
+- pymdownx.highlight:
+    linenums: true
+    anchor_linenums: true
+    line_spans: __span
+    pygments_lang_class: true
+- pymdownx.tabbed:
+    alternate_style: true
+- pymdownx.tasklist:
+    custom_checkbox: true
+- tables
+- footnotes
+- pymdownx.caret
+- pymdownx.tilde
+- pymdownx.mark
+extra_css:
+- https://unpkg.com/dracula-prism/dist/css/dracula-prism.css
+plugins:
+- search