test: add pi-hole test container integration test (#649)

* test: add pi-hole test container integration test

* chore: improve waiting logic for test container

* refactor: improve structure of pi hole test

* fix: eslint does not recognize test directory to be part of tsconfig

packages/integrations/tsconfig.json

@@ -3,6 +3,6 @@
   "compilerOptions": {
     "tsBuildInfoFile": "node_modules/.cache/tsbuildinfo.json"
   },
-  "include": ["*.ts", "src"],
+  "include": ["*.ts", "src", "test"],
   "exclude": ["node_modules"]
 }