Streamlined eslint usage for eslint9 w/ cds8 (#719)

* Streamlined eslint usage

* import from @sap/cds instead of @sap/cds/lib

* Using @sap/cds/eslint.js

* eslint.config.mjs aktualisieren

* Adjusted eslint usage for eslint9 with cds8

eslint.config.mjs

@@ -0,0 +1,20 @@
+import cds from '@sap/cds/eslint.config.mjs'
+export default [ ...cds.recommended ]
+
+//
+// The above is the recommended minimalistic eslint config, just using
+// recommended defaults provided by cds. Alternatively, go for enhanced
+// project-specific options, but only if really required, like this:
+//
+// export default [ ...cds.recommended, {
+//   rules: {
+//     'complexity': [ 'warn', 66 ],
+//     'require-await': 'warn',
+//     'no-await-in-loop': 'warn',
+//   },
+// }, {
+//   ignores: [
+//     '**/webapp/**'
+//   ]
+// }]
+//