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/unit/test_parsers.py

@@ -1,8 +1,11 @@
 import base64
 
-from mail_intake.parsers import normalize_subject
-from mail_intake.parsers import parse_headers, extract_sender
-from mail_intake.parsers import extract_body
+from mail_intake.parsers import (
+    extract_body,
+    extract_sender,
+    normalize_subject,
+    parse_headers,
+)
 
 
 def _b64(text: str) -> str:
@@ -13,6 +16,7 @@ def _b64(text: str) -> str:
 # Subject parsing
 # --------------------
 
+
 def test_normalize_subject_strips_common_prefixes():
     assert normalize_subject("Re: Interview Update") == "Interview Update"
     assert normalize_subject("Fwd: Re: Offer Letter") == "Offer Letter"
@@ -32,6 +36,7 @@ def test_normalize_subject_empty_and_none_safe():
 # Header parsing
 # --------------------
 
+
 def test_parse_headers_lowercases_keys():
     raw_headers = [
         {"name": "From", "value": "Alice <alice@example.com>"},
@@ -82,6 +87,7 @@ def test_extract_sender_missing_from():
 # Body parsing
 # --------------------
 
+
 def test_extract_body_prefers_text_plain():
     payload = {
         "parts": [
@@ -116,9 +122,7 @@ def test_extract_body_falls_back_to_html():
 
 
 def test_extract_body_single_part():
-    payload = {
-        "body": {"data": _b64("Single part body")}
-    }
+    payload = {"body": {"data": _b64("Single part body")}}
 
     body = extract_body(payload)
     assert body == "Single part body"