Refactor and rebrand Rojo to Atlas

- Renamed the project from Rojo to Atlas, updating all relevant files, scripts, and documentation to reflect the new branding.
- Bumped version to 7.7.0-rc.2 and updated protocol version from 5 to 6.
- Modified installation scripts and CI workflows to use the new binary name and paths.
- Adjusted plugin settings and internal identifiers to prevent conflicts with the original Rojo.
- Enhanced session management and API response handling to support the new server fork identifier.
- Updated project templates and README files to guide users on using Atlas.

src/web/api.rs

@@ -272,6 +272,7 @@ impl ApiService {
         msgpack_ok(&ServerInfoResponse {
             server_version: SERVER_VERSION.to_owned(),
             protocol_version: PROTOCOL_VERSION,
+            server_fork: "atlas".to_owned(),
             session_id: self.serve_session.session_id(),
             project_name: self.serve_session.project_name().to_owned(),
             expected_place_ids: self.serve_session.serve_place_ids().cloned(),