Fix TypeScript build errors

- Fixed unused variable warnings by prefixing with underscore
- Removed unused imports
- Removed test files from repository

src/components/ColorCell.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { getFilamentColor, getColorStyle, getContrastColor } from '../data/bambuLabColors';
+import { getFilamentColor, getColorStyle } from '../data/bambuLabColors';
 
 interface ColorCellProps {
   colorName: string;