Add some initial api tests for budgets and accounts (#1991)

packages/api/jest.config.js

@@ -0,0 +1,24 @@
+module.exports = {
+  moduleFileExtensions: [
+    'testing.js',
+    'testing.ts',
+    'api.js',
+    'api.ts',
+    'api.tsx',
+    'electron.js',
+    'electron.ts',
+    'mjs',
+    'js',
+    'ts',
+    'tsx',
+    'json',
+  ],
+  testEnvironment: 'node',
+  testPathIgnorePatterns: ['/node_modules/'],
+  watchPathIgnorePatterns: ['<rootDir>/mocks/budgets/'],
+  setupFilesAfterEnv: ['<rootDir>/../loot-core/src/mocks/setup.ts'],
+  transformIgnorePatterns: ['/node_modules/'],
+  transform: {
+    '^.+\\.(t|j)sx?$': '@swc/jest',
+  },
+};