[Feature] Setup PHP8.4 version for Copilot and authorization

[lisachenko]

To make copilot working with latest codebase, PHP version should be configured to PHP8.4 (copilot uses PHP8.3 now, which triggers error during analysis and test run)

Also, authorization for GH inside Copilot env should be configured to avoid API limit errors.

goaop/framework#541 need to reproduce this PR here.