✨ Add Star Wars: The Force theme

[Aharshi3614]

✨ Add Star Wars: The Force Theme

📋 Summary

This PR adds a new Star Wars: The Force theme to GitCanvas, bringing iconic Light Side and Dark Side colors to GitHub contribution visualizations.

🎨 Color Palette Implementation

Contribution Level	Color Name	Hex Code	Force Aspect
Background	Deep Space Black	#0B0C10	The Void
Level 0 (None)	Holographic Grey/Blue	#1F2833	Holocron Glow
Level 1 (Low)	Jedi Blue	#4BD5EE	Lightsaber (Blue)
Level 2 (Medium)	Yoda Green	#2FF924	Dagobah Swamp
Level 3 (High)	Mace Windu Purple	#8A2BE2	Vaapad Style
Level 4 (Max)	Sith Red	#FF0000	Dark Side Power

📁 Files Modified

• themes/styles.py - Added Star Wars theme configuration
• generators/contrib_card.py - Added color palette mapping for contribution levels

✅ Testing Checklist

• Theme appears in Theme Gallery dropdown
• Theme card displays correctly in gallery
• Contribution levels show correct Star Wars colors
• Background renders as deep space black
• Title text shows Jedi Blue color
• Works with mock data
• No breaking changes to existing themes
• Code follows existing theme patterns

🔗 Related Issue

Closes #305 - Feature request for Star Wars theme

🚀 Additional Notes

• Theme tags: ["dark", "space", "sci-fi", "star wars", "colorful", "popular"]
• Font family uses Orbitron for sci-fi feel
• Maintains consistency with existing theme structur