refactor(frontend): Remove unnecessary keywords in `BaseAutoGPTServerAPI`

[BaunaBadmosh]

Background

fixed issue #8101

Changes 🏗️

the main change to the BaseAutoGPTServerAPI class was the removal of the async keyword from 23 methods that don't use await internally. These methods now return Promises directly, which is more efficient and cleaner. The async keyword was retained for 4 methods that do use await. No changes were made to private methods or WebSocket-related functions. These modifications address the issue of unnecessary async functions while maintaining the same functionality, improving code efficiency without altering the class's behavior.

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:white_check_mark: majdyz
:white_check_mark: Torantulino
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