feat(B2): add Microsoft Word (.docx) support

Implements ROADMAP task B2 — full .docx scraping support via mammoth +
python-docx, producing SKILL.md + references/ output identical to other
source types.

New files:
- src/skill_seekers/cli/word_scraper.py — WordToSkillConverter class +
  main() entry point (~600 lines); mammoth → BeautifulSoup pipeline;
  handles headings, code detection (incl. monospace <p><br> blocks),
  tables, images, metadata extraction
- src/skill_seekers/cli/arguments/word.py — add_word_arguments() +
  WORD_ARGUMENTS dict
- src/skill_seekers/cli/parsers/word_parser.py — WordParser for unified
  CLI parser registry
- tests/test_word_scraper.py — comprehensive test suite (~300 lines)

Modified files:
- src/skill_seekers/cli/main.py — registered "word" command module
- src/skill_seekers/cli/source_detector.py — .docx auto-detection +
  _detect_word() classmethod
- src/skill_seekers/cli/create_command.py — _route_word() + --help-word
- src/skill_seekers/cli/arguments/create.py — WORD_ARGUMENTS + routing
- src/skill_seekers/cli/arguments/__init__.py — export word args
- src/skill_seekers/cli/parsers/__init__.py — register WordParser
- src/skill_seekers/cli/unified_scraper.py — _scrape_word() integration
- src/skill_seekers/cli/pdf_scraper.py — fix: real enhancement instead
  of stub; remove [:3] reference file limit; capture run_workflows return
- src/skill_seekers/cli/github_scraper.py — fix: remove arbitrary
  open_issues[:20] / closed_issues[:10] reference file limits
- pyproject.toml — skill-seekers-word entry point + docx optional dep
- tests/test_cli_parsers.py — update parser count 21→22

Bug fixes applied during real-world testing:
- Code detection: detect monospace <p><br> blocks as code (mammoth
  renders Courier paragraphs this way, not as <pre>/<code>)
- Language detector: fix wrong method name detect_from_text →
  detect_from_code
- Description inference: pass None from main() so extract_docx() can
  infer description from Word document subject/title metadata
- Bullet-point guard: exclude prose starting with •/-/* from code scoring
- Enhancement: implement real API/LOCAL enhancement (was stub)
- pip install message: add quotes around skill-seekers[docx]

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -109,6 +109,12 @@ azure = [
     "azure-storage-blob>=12.19.0",
 ]
 
+# Word document (.docx) support
+docx = [
+    "mammoth>=1.6.0",
+    "python-docx>=1.1.0",
+]
+
 # RAG vector database upload support
 chroma = [
     "chromadb>=0.4.0",
@@ -146,6 +152,8 @@ embedding = [
 
 # All optional dependencies combined (dev dependencies now in [dependency-groups])
 all = [
+    "mammoth>=1.6.0",
+    "python-docx>=1.1.0",
     "mcp>=1.25,<2",
     "httpx>=0.28.1",
     "httpx-sse>=0.4.3",
@@ -186,6 +194,7 @@ skill-seekers-resume = "skill_seekers.cli.resume_command:main"
 skill-seekers-scrape = "skill_seekers.cli.doc_scraper:main"
 skill-seekers-github = "skill_seekers.cli.github_scraper:main"
 skill-seekers-pdf = "skill_seekers.cli.pdf_scraper:main"
+skill-seekers-word = "skill_seekers.cli.word_scraper:main"
 skill-seekers-unified = "skill_seekers.cli.unified_scraper:main"
 skill-seekers-enhance = "skill_seekers.cli.enhance_command:main"
 skill-seekers-enhance-status = "skill_seekers.cli.enhance_status:main"