Please make freechatgpt and searxng endpoints configurable

[wahyd4]

First of all, thanks for sharing this great project, it's pretty cool.

Currently they are hardcoded:

• https://github.com/nashsu/FreeAskInternet/blob/main/free_ask_internet.py#L38
• https://github.com/nashsu/FreeAskInternet/blob/main/free_ask_internet.py#L142C31-L142C40 It would be good to make them configurable, so users can use hosted versions such as hosted searxng instances instead hosting them; also some users could have existing searxng running already and the URL would be different to the one you have in the source code.