feat: extract groombook/web from monorepo

- Copy apps/web/ with all src, components, pages, portal
- Inline packages/types/ as local packages/types module
- Add tsconfig path aliases for @groombook/types
- Port Dockerfile and CI workflow
- Image name: ghcr.io/groombook/web

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/pages/BookingError.tsx

@@ -0,0 +1,49 @@
+export function BookingErrorPage() {
+  return (
+    <div
+      style={{
+        minHeight: "100vh",
+        display: "flex",
+        alignItems: "center",
+        justifyContent: "center",
+        fontFamily: "system-ui, sans-serif",
+        background: "#fef2f2",
+      }}
+    >
+      <div
+        style={{
+          background: "#fff",
+          borderRadius: 12,
+          padding: "2.5rem 3rem",
+          boxShadow: "0 4px 24px rgba(0,0,0,0.08)",
+          textAlign: "center",
+          maxWidth: 420,
+        }}
+      >
+        <div style={{ fontSize: 56, marginBottom: "0.5rem" }}>⚠️</div>
+        <h1 style={{ color: "#b91c1c", fontSize: 24, margin: "0 0 0.5rem" }}>
+          Link Invalid or Expired
+        </h1>
+        <p style={{ color: "#4b5563", margin: "0 0 1.5rem" }}>
+          This confirmation link is invalid, has already been used, or your
+          appointment has already passed. Please contact us if you need help.
+        </p>
+        <a
+          href="/"
+          style={{
+            display: "inline-block",
+            padding: "0.6rem 1.5rem",
+            background: "#dc2626",
+            color: "#fff",
+            borderRadius: 6,
+            textDecoration: "none",
+            fontWeight: 600,
+            fontSize: 14,
+          }}
+        >
+          Back to Portal
+        </a>
+      </div>
+    </div>
+  );
+}