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

mail_intake/auth/google.py

@@ -17,12 +17,12 @@ No Google authentication details should leak outside this module.
 """
 
 import os
-from typing import Sequence
+from collections.abc import Sequence
 
 import google.auth.exceptions
 from google.auth.transport.requests import Request
-from google_auth_oauthlib.flow import InstalledAppFlow
 from google.oauth2.credentials import Credentials
+from google_auth_oauthlib.flow import InstalledAppFlow
 
 from mail_intake.auth.base import MailIntakeAuthProvider
 from mail_intake.credentials.store import CredentialStore

mail_intake/auth/google.pyi

@@ -1,7 +1,11 @@
-from typing import Sequence, Any
+from collections.abc import Sequence
+from typing import Any
+
 from mail_intake.auth.base import MailIntakeAuthProvider
 from mail_intake.credentials.store import CredentialStore
 
 class MailIntakeGoogleAuth(MailIntakeAuthProvider[Any]):
-    def __init__(self, credentials_path: str, store: CredentialStore[Any], scopes: Sequence[str]) -> None: ...
+    def __init__(
+        self, credentials_path: str, store: CredentialStore[Any], scopes: Sequence[str]
+    ) -> None: ...
     def get_credentials(self) -> Any: ...