revert(version): undo version refactor and tests, keep single-file change

Keep the User-Agent change as a single edit to
packages/core/src/infrastructure/http/request.ts. Remove the @homarr/version
package, the consumer migrations, and the unit tests.

packages/api/package.json

@@ -46,7 +46,6 @@
     "@homarr/server-settings": "workspace:^0.1.0",
     "@homarr/translation": "workspace:^0.1.0",
     "@homarr/validation": "workspace:^0.1.0",
-    "@homarr/version": "workspace:^0.1.0",
     "@kubernetes/client-node": "catalog:",
     "@tanstack/react-query": "catalog:",
     "@trpc/client": "catalog:",