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.sh

@@ -1,29 +0,0 @@
-#!/bin/bash
-
-echo "MTG Python Deckbuilder - Docker Hub Runner"
-echo "==========================================="
-
-# Create directories if they don't exist
-mkdir -p deck_files logs csv_files
-mkdir -p config 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
-
-# Run the Docker container with proper volume mounts
-docker run -it --rm \
-  -v "$(pwd)/deck_files":/app/deck_files \
-  -v "$(pwd)/logs":/app/logs \
-  -v "$(pwd)/csv_files":/app/csv_files \
-  -v "$(pwd)/owned_cards":/app/owned_cards \
-  -v "$(pwd)/config":/app/config \
-  mwisnowski/mtg-python-deckbuilder:latest
-
-echo
-echo "MTG Python Deckbuilder session ended."
-echo "Your files are saved in: $(pwd)"