Rewrite SKILLS/ as flat Markdown reference files and extend examples

[martin-majlis]

Summary

• SKILLS/ rewritten: replaced 6 per-skill directories (each with SKILL.md, sync.py, async.py, cli.sh) with 4 flat Markdown files in the style of the Anthropic skills repo: README.md, python-sync.md, python-async.md, bash.md — inline code snippets per feature, no separate script files
• Examples extended: example_sync.py and example_async.py now print more properties when iterating over images (added size, mediatype, timestamp, descriptionurl) and pages (batch coords show per-item lat/lon; batch images show first titles; search results include timestamp and snippet; geosearch includes primary)
• New CLI example: examples/example_cli.sh mirrors the Python examples section-by-section, covering all 16 feature areas via wikipedia-api commands

Changed Files

File	Change
SKILLS/README.md	New — installation, client init, quick start
SKILLS/python-sync.md	New — full synchronous API reference
SKILLS/python-async.md	New — full asynchronous API reference with sync/async comparison table
SKILLS/bash.md	New — full CLI command reference
SKILLS/*/ (6 dirs)	Deleted — old per-skill directory layout
examples/example_sync.py	Extended image/search/geo/batch output
examples/example_async.py	Extended image/search/geo/batch output (async)
examples/example_cli.sh	New — CLI equivalent of Python examples

Test plan

• make run-pre-commit passes (verified)
• examples/example_sync.py runs without errors against live Wikipedia
• examples/example_async.py runs without errors against live Wikipedia
• examples/example_cli.sh runs without errors with wikipedia-api installed

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.04%. Comparing base (987a256) to head (e8aad27).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #552   +/-   ##
=======================================
  Coverage   94.04%   94.04%           
=======================================
  Files          76       76           
  Lines        3373     3373           
=======================================
  Hits         3172     3172           
  Misses        201      201           

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