test(plugin-eslint): add tsconfig for todos-app

@code-pushup/cli-source:code-pushup task (run in CI) fails without it

Author: vmasek

packages/plugin-eslint/mocks/fixtures/todos-app/tsconfig.base.json

@@ -0,0 +1,19 @@
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "rootDir": ".",
+    "sourceMap": true,
+    "declaration": false,
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "importHelpers": true,
+    "target": "ES2022",
+    "module": "esnext",
+    "lib": ["ES2022", "dom"],
+    "skipLibCheck": true,
+    "skipDefaultLibCheck": true,
+    "baseUrl": "."
+  },
+  "exclude": ["node_modules", "tmp"]
+}