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>

src/skill_seekers/cli/github_scraper.py

@@ -1296,14 +1296,14 @@ Use this skill when you need to:
         closed_issues = [i for i in issues if i["state"] == "closed"]
 
         content += f"## Open Issues ({len(open_issues)})\n\n"
-        for issue in open_issues[:20]:
+        for issue in open_issues:
             labels = ", ".join(issue["labels"]) if issue["labels"] else "No labels"
             content += f"### #{issue['number']}: {issue['title']}\n"
             content += f"**Labels:** {labels} | **Created:** {issue['created_at'][:10]}\n"
             content += f"[View on GitHub]({issue['url']})\n\n"
 
         content += f"\n## Recently Closed Issues ({len(closed_issues)})\n\n"
-        for issue in closed_issues[:10]:
+        for issue in closed_issues:
             labels = ", ".join(issue["labels"]) if issue["labels"] else "No labels"
             content += f"### #{issue['number']}: {issue['title']}\n"
             content += f"**Labels:** {labels} | **Closed:** {issue['closed_at'][:10]}\n"