Add support for alternate token paths for debugging

[notsniped]

This helps in debugging the bot client on programs like VS Code by allowing tokens to be easily imported, and minimizes the risk of accidentally leaking bot tokens on Git.

[notsniped]

I almost got an idea for simply moving runtimeconfig.json out of the project dir, and having it auto-generate in the bot's current working directory. But if I think about it, its not a good idea because it leads to import issues with the internal Python libs.