Migrate to Go and add support for Telegram Topics

[Gredin67]

• https://github.com/mautrix/telegramgo
• Telegram Topics mautrix/telegram#865

[Gredin67]

builds are available here https://mau.dev/mautrix/telegramgo/-/jobs?kind=BUILD

[Gredin67]

something similar to YunoHost-Apps/mautrix_whatsapp_ynh@48572e6

[Gredin67]

Upgrade to Go version with support for Topics is already possible through the branch go.

We will wait for release of https://github.com/mautrix/telegramgo before to merge in master.