fix TS errors when checking unit tests

(it was loading the setup files, then following the imports into "built" directory. as those are compiled JS, it produced lots of type errors.)

packages/backend/jest.config.e2e.ts

@@ -8,7 +8,7 @@ import base from './jest.config.common.ts';
 export default {
 	...base,
 	globalSetup: "<rootDir>/built-test/entry.js",
-	setupFilesAfterEnv: ["<rootDir>/test/jest.setup.e2e.ts"],
+	setupFilesAfterEnv: ["<rootDir>/test/jest.setup.e2e.mjs"],
 	testMatch: [
 		"<rootDir>/test/e2e/**/*.ts",
 	],

packages/backend/jest.config.unit.ts

@@ -7,7 +7,7 @@ import base from './jest.config.common.ts';
 
 export default {
 	...base,
-	globalSetup: '<rootDir>/test/jest.setup.unit.ts',
+	globalSetup: '<rootDir>/test/jest.setup.unit.mjs',
 	testMatch: [
 		"<rootDir>/test/unit/**/*.ts",
 		"<rootDir>/src/**/*.test.ts",

packages/backend/test/eslint.config.js

@@ -36,6 +36,7 @@ export default [
 		ignores: [
 			"**/built/",
 			'*.*',
+			"**/jest.setup.*"
 		],
 	},
 ];