extensions: add remote config sync job to IDEA

[Yurzs]

Description

Now remote config set in IDEA Plugin settings is synced periodically the same way as a VSCode one.

Checklist

• [x] The base branch of this PR is dev, rather than main
• [x] The relevant docs, if any, have been updated or created

Testing

1. Check configs in ~/.continue/.configs
2. Set remote config server in IDEA Plugin.
3. Check ~/.continue/.configs. There should be new folder with your server hostname and a config.js/config.json (If server returns JSON with configJs and configJson keys.