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

package-lock.json

@@ -25,7 +25,6 @@
             },
             "devDependencies": {
                 "@cap-js/sqlite": "^1",
-                "@sap/eslint-plugin-cds": "^3",
                 "axios": "^1",
                 "chai": "^4.3.4",
                 "chai-as-promised": "^7.1.1",
@@ -590,23 +589,6 @@
                 "node": ">=14"
             }
         },
-        "node_modules/@sap/eslint-plugin-cds": {
-            "version": "3.0.4",
-            "resolved": "https://registry.npmjs.org/@sap/eslint-plugin-cds/-/eslint-plugin-cds-3.0.4.tgz",
-            "integrity": "sha512-1fEtpkSMaRHb35vPxyoO08zJsBaCH/7jjQT7D99XxNIQBMDybYGL1sZoicg/XNzPxB8ZyW2T86dvHBJ8WGY7sg==",
-            "dev": true,
-            "license": "See LICENSE file",
-            "dependencies": {
-                "@sap/cds": ">=7",
-                "semver": "^7.3.4"
-            },
-            "engines": {
-                "node": ">=18"
-            },
-            "peerDependencies": {
-                "eslint": ">=8"
-            }
-        },
         "node_modules/@sinclair/typebox": {
             "version": "0.27.8",
             "resolved": "https://registry.npmjs.org/@sinclair/typebox/-/typebox-0.27.8.tgz",