fix: convert antfarm from broken submodule to regular directory

Fixes Gitea 500 error caused by invalid submodule reference.
Converted antfarm from pseudo-submodule (missing .gitmodules) to
regular directory with all source files.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

antfarm/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "antfarm",
+  "version": "0.2.0",
+  "type": "module",
+  "private": true,
+  "engines": {
+    "node": ">=22"
+  },
+  "bin": {
+    "antfarm": "dist/cli/cli.js"
+  },
+  "scripts": {
+    "build": "tsc -p tsconfig.json && cp src/server/index.html dist/server/index.html && chmod +x dist/cli/cli.js",
+    "start": "node dist/cli/cli.js"
+  },
+  "dependencies": {
+    "json5": "^2.2.3",
+    "yaml": "^2.4.5"
+  },
+  "devDependencies": {
+    "@types/node": "^25.2.1",
+    "typescript": "^5.9.3"
+  }
+}