Clean up: remove obsolete files, update docs and docstrings

Removed 20 files: old test scripts, debug tools, duplicate docs,
generated JSON, old PDF generator, launcher scripts.

Kept:
  disco.py        — main tool (scrape HAR + generate PDF)
  scraper.py      — reference site scraper (HTML + Selenium/Brave)
  requirements.txt
  *.har           — browser capture with API data

Updated:
  README.md       — rewritten to reflect current tool and usage
  .gitignore      — simplified
  scraper.py      — module/class/method docstrings updated to clarify
                    this is a reference implementation, disco.py is primary

.gitignore

@@ -1,37 +1,11 @@
-# Virtual environment
 venv/
-env/
-.env
-
-# Python cache
 __pycache__/
 *.pyc
-*.pyo
-*.pyd
-.Python
-*.so
-.pytest_cache/
 
-# Output files
-pokemon_tcg_products_*.json
+# Generated output
 catalog_output/
-test_output/
+pokemon_tcg_products_*.json
 
-# Logs
-*.log
-
-# OS files
+# OS / editor
 .DS_Store
-Thumbs.db
-.directory
-
-# IDE files
-.vscode/
-.idea/
 *.swp
-*.swo
-
-# Temporary files
-*.tmp
-*.temp
-.cache/