Add Reqnroll BDD extension to community catalog (#2545)

Add reqnroll-bdd extension submitted by @stenyin (LoogaCY Studio) to:
- extensions/catalog.community.json (alphabetical order)
- README.md community extensions table

Closes #2544

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-05-12T21:40:51Z",
+  "updated_at": "2026-05-13T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -2081,6 +2081,44 @@
       "created_at": "2026-03-23T13:30:00Z",
       "updated_at": "2026-03-23T13:30:00Z"
     },
+    "reqnroll-bdd": {
+      "name": "Reqnroll BDD",
+      "id": "reqnroll-bdd",
+      "description": "Adds Reqnroll BDD planning, Gherkin generation, traceability, safe task injection, handoff, and verification to Spec Kit.",
+      "author": "LoogaCY Studio",
+      "version": "1.0.0",
+      "download_url": "https://github.com/LoogacyStudio/spec-kit-reqnroll-bdd/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/LoogacyStudio/spec-kit-reqnroll-bdd",
+      "homepage": "https://github.com/LoogacyStudio/spec-kit-reqnroll-bdd",
+      "documentation": "https://github.com/LoogacyStudio/spec-kit-reqnroll-bdd#readme",
+      "changelog": "https://github.com/LoogacyStudio/spec-kit-reqnroll-bdd/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.8.0",
+        "tools": [
+          {
+            "name": "dotnet",
+            "required": false
+          }
+        ]
+      },
+      "provides": {
+        "commands": 4,
+        "hooks": 1
+      },
+      "tags": [
+        "bdd",
+        "reqnroll",
+        "dotnet",
+        "gherkin",
+        "acceptance-testing"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-05-13T00:00:00Z",
+      "updated_at": "2026-05-13T00:00:00Z"
+    },
     "retro": {
       "name": "Retro Extension",
       "id": "retro",