feat 🥁: add no-zero-unit rule

This rule enforces unitless zero values in vanilla-extract style objects:
- Automatically removes unnecessary units from zero values
- Handles both positive and negative zero values
- Preserves units where required (time properties, CSS functions)
- Works with all vanilla-extract APIs

tsconfig.json

@@ -13,6 +13,8 @@
     "strict": true,
     "noUncheckedIndexedAccess": true,
     "noImplicitOverride": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
     "useUnknownInCatchVariables": true,
 
     // Interop Options