[client/ui] Replace fyne UI with Wails (rename ui-wails to ui)

Removes the legacy fyne-based client/ui implementation and renames the
Wails replacement (client/ui-wails) to take its place at client/ui. Go
imports, frontend bindings, CI workflows, goreleaser configs and the
windows .syso icon path are updated to follow the rename.

client/ui/frontend/src/components/Input.tsx

@@ -0,0 +1,33 @@
+import { InputHTMLAttributes, forwardRef } from "react";
+import { cn } from "../lib/cn";
+
+interface Props extends InputHTMLAttributes<HTMLInputElement> {
+  label?: string;
+}
+
+export const Input = forwardRef<HTMLInputElement, Props>(function Input(
+  { label, className, id, ...rest },
+  ref,
+) {
+  const inputId = id ?? label?.toLowerCase().replace(/\s+/g, "-");
+  return (
+    <div className="flex flex-col gap-1">
+      {label && (
+        <label htmlFor={inputId} className="text-xs font-medium text-nb-gray-600 dark:text-nb-gray-300">
+          {label}
+        </label>
+      )}
+      <input
+        id={inputId}
+        ref={ref}
+        className={cn(
+          "h-9 rounded-md border border-nb-gray-300 bg-white px-3 text-sm",
+          "focus:border-netbird focus:outline-none focus:ring-1 focus:ring-netbird",
+          "dark:border-nb-gray-700 dark:bg-nb-gray-925 dark:text-nb-gray-50",
+          className,
+        )}
+        {...rest}
+      />
+    </div>
+  );
+});