Add Token Economy extension to community catalog (#3049)

Add token-economy extension submitted by @formin to:
- extensions/catalog.community.json (alphabetical order)
- docs/community/extensions.md community extensions table

Closes #3048

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

extensions/catalog.community.json

@@ -3798,6 +3798,46 @@
       "created_at": "2026-05-26T00:00:00Z",
       "updated_at": "2026-05-26T00:00:00Z"
     },
+    "token-economy": {
+      "name": "Token Economy",
+      "id": "token-economy",
+      "description": "Token routing, measured savings, and context audit workflows.",
+      "author": "formin",
+      "version": "1.0.0",
+      "download_url": "https://github.com/formin/spec-kit-token-economy/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/formin/spec-kit-token-economy",
+      "homepage": "https://github.com/formin/spec-kit-token-economy",
+      "documentation": "https://github.com/formin/spec-kit-token-economy/blob/main/README.md",
+      "changelog": "https://github.com/formin/spec-kit-token-economy/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "category": "process",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=0.10.0",
+        "tools": [
+          { "name": "rtk", "required": false },
+          { "name": "headroom", "required": false },
+          { "name": "token-router", "required": false },
+          { "name": "ollama", "required": false },
+          { "name": "python", "version": ">=3.10", "required": false }
+        ]
+      },
+      "provides": {
+        "commands": 3,
+        "hooks": 2
+      },
+      "tags": [
+        "tokens",
+        "routing",
+        "reporting",
+        "context"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-06-17T00:00:00Z",
+      "updated_at": "2026-06-17T00:00:00Z"
+    },
     "trace": {
       "name": "Spec Trace",
       "id": "trace",