feat: add administration page and account role management

- Implemented `AdministrationContent` component for managing account roles.
- Created `AdministrationPage` to serve as the main entry point for administration tasks.
- Added PDF preview functionality with `PdfPreviewFrame` component for invoice generation.
- Introduced `InputColor` component for advanced color selection with various formats.
- Established color conversion utilities in `color-converter.ts` for handling color formats.
- Defined appearance-related schemas and types in `appearance.ts` for consistent theme management.

src/components/ui/label.tsx

@@ -1,9 +1,9 @@
-"use client"
+"use client";
 
-import * as React from "react"
-import * as LabelPrimitive from "@radix-ui/react-label"
+import * as React from "react";
+import * as LabelPrimitive from "@radix-ui/react-label";
 
-import { cn } from "~/lib/utils"
+import { cn } from "~/lib/utils";
 
 function Label({
   className,
@@ -14,11 +14,11 @@ function Label({
       data-slot="label"
       className={cn(
         "flex items-center gap-2 text-sm leading-none font-medium select-none group-data-[disabled=true]:pointer-events-none group-data-[disabled=true]:opacity-50 peer-disabled:cursor-not-allowed peer-disabled:opacity-50",
-        className
+        className,
       )}
       {...props}
     />
-  )
+  );
 }
 
-export { Label }
+export { Label };