Provide all necessary handlers for migrating current token icon infra to token-server
- Support for image uploads at new endpoint
- Add support in Cashtab for new server
- Telegram bot for mod approval/rejection
The telegram bot features are not tested in the app, though I have extensively tested them manually and locally. I looked into adding tests for this but the process is not straightforward (emulate telegram, emulate clicking on rendered telegram messages). Since this feature is used only by the admin, imo it is ok to leave automatic testing out. Expected that we will always have some degree of possible manual work with token icons.