Add @types/bun to api-contract for test file compilation

The test file imports from bun:test which requires bun types. Added
@types/bun dependency and configured tsconfig to include bun types.

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

bun.lock

@@ -127,6 +127,7 @@
       "devDependencies": {
         "@macalinao/eslint-config": "catalog:",
         "@macalinao/tsconfig": "catalog:",
+        "@types/bun": "^1.3.5",
         "eslint": "catalog:",
         "typescript": "catalog:",
       },

packages/api-contract/package.json

@@ -25,6 +25,7 @@
   "devDependencies": {
     "@macalinao/eslint-config": "catalog:",
     "@macalinao/tsconfig": "catalog:",
+    "@types/bun": "^1.3.5",
     "eslint": "catalog:",
     "typescript": "catalog:"
   }

packages/api-contract/tsconfig.json

@@ -1,6 +1,7 @@
 {
   "extends": "@macalinao/tsconfig/tsconfig.base.json",
   "compilerOptions": {
-    "isolatedDeclarations": false
+    "isolatedDeclarations": false,
+    "types": ["bun"]
   }
 }