feat: update observatory dependencies and upgrade nextjs to v15 (#2765)

* wip fix next15

* feat: start migration to nextjs 15

* fix: fix categories and revert to maplibre 4

* fix: build

* fix: pageTitle in cat pages

public/.eslintrc.json

@@ -1,8 +1,9 @@
 {
   "plugins": ["@typescript-eslint"],
-  "extends": ["next/core-web-vitals", "plugin:@typescript-eslint/recommended", "prettier"],
+  "extends": ["next/core-web-vitals", "plugin:@typescript-eslint/recommended"],
   "rules": {
     "@typescript-eslint/no-unused-vars": "error",
-    "@typescript-eslint/no-explicit-any": "warn"
+    "@typescript-eslint/no-explicit-any": "warn",
+    "@typescript-eslint/no-unused-expressions": "warn"
   }
-}
+}

public/next.config.js

@@ -5,7 +5,6 @@ const nextConfig = {
   output: "export",
   trailingSlash: true,
   reactStrictMode: true, // Recommended for the `pages` directory, default in `app`.
-  swcMinify: true,
   images: {
     dangerouslyAllowSVG: true,
     unoptimized: true,