feat: test integration connection (#669)

* feat: add test integration for pi-hole

* refactor: test integration for pi-hole

* fix: multiple secrets of same type could be used for integration creation

* fix: remove integration test connection test and add mock for test-connection function

* fix: add missing onUpdateFn to mysql integration secrets

* fix: format issues

* feat: add home assistant test connection

* fix: deepsource issues

* test: add system integration tests for test connection

* fix: add before all for pulling home assistant image

* test: add unit tests for handleTestConnectionResponseAsync

* test: add unit test for testConnectionAsync

* test: add mroe tests to integration-test-connection

* fix: deepsource issues

* fix: deepsource issue

* chore: address pull request feedback

packages/integrations/src/base/test-connection-error.ts

@@ -0,0 +1,26 @@
+import { FlattenError } from "@homarr/common";
+import { z } from "@homarr/validation";
+
+import type { TestConnectionError } from "./integration";
+
+export class IntegrationTestConnectionError extends FlattenError {
+  constructor(
+    public key: TestConnectionError["key"],
+    public detailMessage?: string,
+  ) {
+    super("Checking integration connection failed", { key, message: detailMessage });
+  }
+}
+
+const schema = z.object({
+  key: z.custom<TestConnectionError["key"]>((value) => z.string().parse(value)),
+  message: z.string().optional(),
+});
+export const convertIntegrationTestConnectionError = (error: unknown) => {
+  const result = schema.safeParse(error);
+  if (!result.success) {
+    return;
+  }
+
+  return result.data;
+};