chore(release): 0.0.3

Squash-merge lib-standardisation: adopt repo standards across packaging,
tooling, docs, and CI.

- standardize pyproject.toml (canonical packaging, lint config, extras, GSDFC pydoclint)
- add py.typed marker, modernize type hints and Google-style docstrings
- nest generated docs under docs/lib and docs/mcp; add hand-written wiki
- adopt standard Type A PyPI CI pipeline (tag==version guard + quality gate)
- promote generated CHANGELOG.md; bump version to 0.0.3

docs/mcp/nav.json

@@ -0,0 +1,90 @@
+[
+  {
+    "module": "mail_intake",
+    "resource": "docs://modules/mail_intake"
+  },
+  {
+    "module": "mail_intake.adapters",
+    "resource": "docs://modules/mail_intake.adapters"
+  },
+  {
+    "module": "mail_intake.adapters.base",
+    "resource": "docs://modules/mail_intake.adapters.base"
+  },
+  {
+    "module": "mail_intake.adapters.gmail",
+    "resource": "docs://modules/mail_intake.adapters.gmail"
+  },
+  {
+    "module": "mail_intake.auth",
+    "resource": "docs://modules/mail_intake.auth"
+  },
+  {
+    "module": "mail_intake.auth.base",
+    "resource": "docs://modules/mail_intake.auth.base"
+  },
+  {
+    "module": "mail_intake.auth.google",
+    "resource": "docs://modules/mail_intake.auth.google"
+  },
+  {
+    "module": "mail_intake.config",
+    "resource": "docs://modules/mail_intake.config"
+  },
+  {
+    "module": "mail_intake.credentials",
+    "resource": "docs://modules/mail_intake.credentials"
+  },
+  {
+    "module": "mail_intake.credentials.pickle",
+    "resource": "docs://modules/mail_intake.credentials.pickle"
+  },
+  {
+    "module": "mail_intake.credentials.redis",
+    "resource": "docs://modules/mail_intake.credentials.redis"
+  },
+  {
+    "module": "mail_intake.credentials.store",
+    "resource": "docs://modules/mail_intake.credentials.store"
+  },
+  {
+    "module": "mail_intake.exceptions",
+    "resource": "docs://modules/mail_intake.exceptions"
+  },
+  {
+    "module": "mail_intake.ingestion",
+    "resource": "docs://modules/mail_intake.ingestion"
+  },
+  {
+    "module": "mail_intake.ingestion.reader",
+    "resource": "docs://modules/mail_intake.ingestion.reader"
+  },
+  {
+    "module": "mail_intake.models",
+    "resource": "docs://modules/mail_intake.models"
+  },
+  {
+    "module": "mail_intake.models.message",
+    "resource": "docs://modules/mail_intake.models.message"
+  },
+  {
+    "module": "mail_intake.models.thread",
+    "resource": "docs://modules/mail_intake.models.thread"
+  },
+  {
+    "module": "mail_intake.parsers",
+    "resource": "docs://modules/mail_intake.parsers"
+  },
+  {
+    "module": "mail_intake.parsers.body",
+    "resource": "docs://modules/mail_intake.parsers.body"
+  },
+  {
+    "module": "mail_intake.parsers.headers",
+    "resource": "docs://modules/mail_intake.parsers.headers"
+  },
+  {
+    "module": "mail_intake.parsers.subject",
+    "resource": "docs://modules/mail_intake.parsers.subject"
+  }
+]