added initial integration tests with bun

libs/config/bunfig.toml

@@ -0,0 +1,15 @@
+[test]
+# Configure path mapping for tests
+preload = ["./test/setup.ts"]
+
+# Test configuration
+timeout = 5000
+
+# Set test environment
+env = { NODE_ENV = "test" }
+
+[bun]
+# Enable TypeScript paths resolution
+paths = {
+  "@/*" = ["./src/*"]
+}