chore: drop root mkdocs.yml; adopt per-kind docs/mkdocs.lib.yml as source of truth

docs/mkdocs.lib.yml

@@ -0,0 +1,100 @@
+theme:
+  name: material
+  palette:
+  - scheme: slate
+    primary: deep purple
+    accent: cyan
+  font:
+    text: Inter
+    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
+  icon:
+    logo: material/inbox
+    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
+- mkdocstrings:
+    handlers:
+      python:
+        paths:
+        - ..
+        options:
+          docstring_style: google
+          show_source: false
+          show_signature_annotations: true
+          separate_signature: true
+          merge_init_into_class: true
+          inherited_members: true
+          annotations_path: brief
+          show_root_heading: true
+          group_by_category: true
+          show_category_heading: true
+          show_object_full_path: false
+          show_symbol_type_heading: true
+site_name: mail_intake
+docs_dir: lib
+site_dir: ../site/lib
+nav:
+- Home: index.md
+- Core API:
+  - ingestion/index.md
+  - ingestion/reader.md
+- Domain Models:
+  - models/index.md
+  - models/message.md
+  - models/thread.md
+- Provider Adapters:
+  - adapters/index.md
+  - adapters/base.md
+  - adapters/gmail.md
+- Authentication & Storage:
+  - auth/index.md
+  - auth/base.md
+  - auth/google.md
+  - credentials/index.md
+  - credentials/store.md
+  - credentials/pickle.md
+  - credentials/redis.md
+- Normalization & Parsing:
+  - parsers/index.md
+  - parsers/body.md
+  - parsers/headers.md
+  - parsers/subject.md
+- Configuration & Errors:
+  - config.md
+  - exceptions.md