Add collection scraper and local mod detection

README.md

@@ -1,2 +1,48 @@
-# ProgressionMods
+# Steam Workshop Collection Manager
 
+A Python GUI application for extracting Steam Workshop mod IDs from RimWorld mod collections.
+
+## Features
+
+- Dark themed Windows-style GUI
+- Three input fields for different mod collection types (Core, Content, Cosmetics)
+- Automatic extraction of Workshop IDs from Steam collection URLs
+- Real-time output display with scrollable text area
+- Pre-populated with example RimWorld mod collections
+
+## Installation
+
+1. Make sure you have Python 3.6+ installed
+2. Install required dependencies:
+   ```
+   pip install -r requirements.txt
+   ```
+
+## Usage
+
+1. Run the application:
+   ```
+   python steam_workshop_gui.py
+   ```
+
+2. The application comes pre-populated with example collection URLs:
+   - **Core**: https://steamcommunity.com/workshop/filedetails/?id=3521297585
+   - **Content**: steam://openurl/https://steamcommunity.com/sharedfiles/filedetails/?id=3521319712
+   - **Cosmetics**: steam://openurl/https://steamcommunity.com/sharedfiles/filedetails/?id=3637541646
+
+3. You can modify these URLs or enter your own Steam Workshop collection URLs
+
+4. Click "Extract Workshop IDs" to process the collections
+
+5. The right panel will display all the Workshop IDs found in each collection
+
+## URL Formats Supported
+
+- Standard Steam Workshop URLs: `https://steamcommunity.com/workshop/filedetails/?id=XXXXXXXXX`
+- Steam protocol URLs: `steam://openurl/https://steamcommunity.com/sharedfiles/filedetails/?id=XXXXXXXXX`
+
+## Notes
+
+- The application fetches collection data directly from Steam Workshop
+- Processing may take a few seconds depending on collection size
+- Workshop IDs are extracted from the HTML content of collection pages