chore: add Biome for formatting and linting (#116)

- Add Biome as formatter and linter (replaces Prettier)
- Configure Husky + lint-staged for pre-commit hooks
- Add VS Code settings for format on save
- Ignore components/ui/ (shadcn generated code)
- Remove semicolons, use 4-space indent
- Reformat all files to new style

components/reset-warning-modal.tsx

@@ -1,6 +1,6 @@
-"use client";
+"use client"
 
-import { Button } from "@/components/ui/button";
+import { Button } from "@/components/ui/button"
 import {
     Dialog,
     DialogContent,
@@ -8,12 +8,12 @@ import {
     DialogFooter,
     DialogHeader,
     DialogTitle,
-} from "@/components/ui/dialog";
+} from "@/components/ui/dialog"
 
 interface ResetWarningModalProps {
-    open: boolean;
-    onOpenChange: (open: boolean) => void;
-    onClear: () => void;
+    open: boolean
+    onOpenChange: (open: boolean) => void
+    onClear: () => void
 }
 
 export function ResetWarningModal({
@@ -44,5 +44,5 @@ export function ResetWarningModal({
                 </DialogFooter>
             </DialogContent>
         </Dialog>
-    );
+    )
 }