chore(release): 0.0.7

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 0.0.7

openapi_first/errors.pyi

@@ -1,6 +1,6 @@
-from typing import Optional
-
 class OpenAPIFirstError(Exception): ...
 
 class MissingOperationHandler(OpenAPIFirstError):
-    def __init__(self, *, path: str, method: str, operation_id: Optional[str] = ...) -> None: ...
+    def __init__(
+        self, *, path: str, method: str, operation_id: str | None = ...
+    ) -> None: ...