Upgrade TypeScript 4.9 → 5.9 (#240)

* update ts

* upd ts to 5.9; upd gitignore; other

package.json

@@ -40,15 +40,17 @@
     },
     "devDependencies": {
         "@eslint/eslintrc": "^3.3.1",
+        "@typescript-eslint/eslint-plugin": "^8.54.0",
+        "@typescript-eslint/parser": "^8.54.0",
         "@types/classnames": "^2.2.10",
         "@types/markdown-it": "^12.2.3",
         "@types/node": "^18.13.0",
         "@types/react": "^18.0.18",
         "@types/sharp": "^0.29.2",
-        "eslint": "^9.0.0",
-        "eslint-config-next": "^15.0.0",
+        "eslint-config-next": "^15.5.0",
         "feed": "^4.1.0",
+        "eslint": "^9.0.0",
         "globals": "^16.0.0",
-        "typescript": "^4.9.0"
+        "typescript": "^5.9.0"
     }
 }