feat: add main features

Agents for developpement added + frontend add + backend added. Git viewer created + agent and template creator + layout and project creator

frontend/src/shared/ui/Spinner.tsx

@@ -0,0 +1,27 @@
+/** Spinner — an indeterminate loading indicator (LD). */
+
+import { cn } from "../lib/cn";
+
+export interface SpinnerProps {
+  /** Diameter in pixels. Defaults to 16. */
+  size?: number;
+  /** Extra classes (e.g. a colour override). */
+  className?: string;
+  /** Accessible label; defaults to "Loading". */
+  label?: string;
+}
+
+/** A CSS-only spinning ring that inherits the current text colour. */
+export function Spinner({ size = 16, className, label = "Loading" }: SpinnerProps) {
+  return (
+    <span
+      role="status"
+      aria-label={label}
+      className={cn(
+        "inline-block animate-spin rounded-full border-2 border-current border-t-transparent",
+        className,
+      )}
+      style={{ width: size, height: size }}
+    />
+  );
+}