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

tests/test_html_table.py

@@ -1,18 +1,15 @@
-from typing import Optional
-
 from pydantic import BaseModel
 
 from omniread import (
     # core
     Content,
-
     # html
     HTMLParser,
 )
 
 
 class ParsedTableHTML(BaseModel):
-    title: Optional[str]
+    title: str | None
     table: list[list[str]]