chore: migrate project to Bun testing framework and update configuration

- Replace Jest with Bun's native testing framework
- Update test configuration and utilities to support Bun test environment
- Add mock implementations for SSE and security testing
- Refactor test setup to use Bun's testing utilities
- Update package dependencies and scripts to align with Bun testing
- Enhance type definitions for Bun test mocking

tsconfig.json

@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
     "target": "ES2022",
-    "module": "NodeNext",
-    "moduleResolution": "NodeNext",
+    "module": "ESNext",
+    "moduleResolution": "node",
     "outDir": "./dist",
     "rootDir": ".",
     "strict": true,
@@ -37,11 +37,11 @@
   },
   "include": [
     "src/**/*",
-    "__tests__/**/*"
+    "jest.config.ts"
   ],
   "exclude": [
     "node_modules",
-    "**/__tests__/**/*.ts",
-    "**/*.test.ts"
+    "dist",
+    "coverage"
   ]
 }