docs: documentation overhaul - archive, user guides, env parity (#62)

* docs: archive CLI runner scripts and Windows Docker guide, update web runner scripts

* docs: overhaul README and DOCKER.md, add 10 user guides

- README: Budget Mode section, corrected Further Reading links, theme badge descriptions, diagnostics expansion
- DOCKER.md: Windows path note, Budget Mode + Include/Exclude sections, env table additions
- docs/user_guides/: 10 new feature guides covering budget mode, include/exclude, locks/replace/permalinks, batch build, theme browser, random build, owned cards, partner mechanics, bracket compliance, quick build & skip controls

* fix: map PriceTimeoutError→503, add budget exceptions to status map; update error_handling.md

* docs: env var parity — add missing vars to .env.example and README table

run-from-dockerhub.bat

@@ -1,36 +0,0 @@
-@echo off
-echo MTG Python Deckbuilder - Docker Hub Runner
-echo ===========================================
-
-REM Create directories if they don't exist
-if not exist "deck_files" mkdir deck_files
-if not exist "logs" mkdir logs
-if not exist "csv_files" mkdir csv_files
-if not exist "config" mkdir config
-if not exist "owned_cards" mkdir owned_cards
-
-echo Starting MTG Python Deckbuilder from Docker Hub...
-echo Your files will be saved in the current directory:
-echo   - deck_files\: Your completed decks
-echo   - logs\: Application logs
-echo   - csv_files\: Card database files
-echo   - config\: JSON configs for headless runs (e.g., deck.json)
-echo.
-
-REM Run the Docker container with proper volume mounts
-docker run -it --rm ^
-  -v "%cd%\deck_files:/app/deck_files" ^
-  -v "%cd%\logs:/app/logs" ^
-  -v "%cd%\csv_files:/app/csv_files" ^
-  -v "%cd%\owned_cards:/app/owned_cards" ^
-  -v "%cd%\config:/app/config" ^
-  mwisnowski/mtg-python-deckbuilder:latest
-
-echo.
-echo MTG Python Deckbuilder session ended.
-echo Your files are saved in: %cd%
-echo.
-echo Tips:
-echo   - For headless: set environment variables, e.g. -e DECK_MODE=headless -e DECK_CONFIG=/app/config/deck.json
-echo   - If the container seems to use an old config, mount the config folder (done above) or prune anonymous volumes.
-pause