✨(frontend) set up Vite-based frontend project

Chose Vite for static output efficiency, aligning with project needs.

All API interactions are currently unauthenticated. SSO support
planned soon, using ProConnect.

UX is minimalistic, and showcases the core idea.

Components introduced:
* AppProvider
* Select and TextArea Rhf inputs

API hooks introduced:
* useGeneratePDF, generates a PDF, and downloads it in the client.
* useTemplates, fetches available templates to populate Select options.

src/frontend/components/ui/input.tsx

@@ -0,0 +1,25 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+export interface InputProps
+  extends React.InputHTMLAttributes<HTMLInputElement> {}
+
+const Input = React.forwardRef<HTMLInputElement, InputProps>(
+  ({ className, type, ...props }, ref) => {
+    return (
+      <input
+        type={type}
+        className={cn(
+          "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Input.displayName = "Input"
+
+export { Input }