chore: update dependencies and license in package.json

- Changed license from Unlicense to EUPL-1.2
- Updated @redocly/cli from ^2.20.5 to ^2.30.2
- Updated @scalar/openapi-upgrader from ^0.2.3 to ^0.2.6
- Updated @stoplight/spectral-rulesets from ^1.22.0 to ^1.22.1
- Updated @stoplight/spectral-runtime from ^1.1.4 to ^1.1.5
- Updated express from ^5.1.0 to ^5.2.1
- Updated openapi-to-postmanv2 from ^5.3.4 to ^6.0.1
- Updated @biomejs/biome from ^2.3.4 to ^2.4.13 [deploy-test]

Author: pasibun

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.3.4/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.4.13/schema.json",
   "formatter": {
     "indentStyle": "space",
     "indentWidth": 2,