Add JSON schema generation for kubeconform CRD validation

- ci/generate-schemas.sh extracts schemas from live cluster CRDs via kubectl
- Generated schemas committed to schemas/ for CI use
- Run `make schemas` to regenerate after CRD or K8s version changes
- validate-apps.sh and validate-clusters.sh check local schemas first
- CRD instances (Gateway, TLSRoute, Pooler, etc.) now validated instead of skipped
- CustomResourceDefinition meta-type still skipped (no schema exists upstream)

schemas/fpga.intel.com/acceleratorfunction_v2.json

@@ -0,0 +1,43 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "properties": {
+    "apiVersion": {
+      "type": "string"
+    },
+    "kind": {
+      "type": "string"
+    },
+    "metadata": {
+      "type": "object"
+    },
+    "spec": {
+      "properties": {
+        "afuId": {
+          "pattern": "^[0-9a-f]{8,40}$",
+          "type": "string"
+        },
+        "interfaceId": {
+          "pattern": "^[0-9a-f]{8,32}$",
+          "type": "string"
+        },
+        "mode": {
+          "pattern": "^af|region$",
+          "type": "string"
+        }
+      },
+      "required": [
+        "afuId",
+        "interfaceId",
+        "mode"
+      ],
+      "type": "object"
+    },
+    "status": {
+      "type": "object"
+    }
+  },
+  "required": [
+    "spec"
+  ],
+  "type": "object"
+}