feat(alerts): add support for telegram group topics & silent notifications

[MicLieg]

Description

This PR adds support for

A) telegram group topics because it was asked for in Discord

Topics function as individual chats within the group – supporting their own shared media and notification settings. Members are free to chat in any topic from Anime to Zoology, using all their favorite features like polls, pinned messages and bots.

B) and silent notifications

“Is it OK to post now?” “Is this urgent enough to notify everyone?” If you're a channel admin, you know these questions too well. Luckily, you can now send silent messages that will not notify your subscribers. This is very useful for late night or non-urgent updates. Tap on the bell icon to toggle silent messages on and off.

Fixes N/A

Type of change

• [ ] Bug fix (a change which fixes an issue).
• [x] New feature (a change which adds functionality).
• [ ] New Server (new server added).
• [ ] Refactor (restructures existing code).
• [ ] Comment update (typo, spelling, explanation, examples, etc).

Checklist

PR will not be merged until all steps are complete.

• [x] This pull request links to an issue.
• [x] This pull request uses the develop branch as its base.
• [x] This pull request subject follows the Conventional Commits standard.
• [x] This code follows the style guidelines of this project.
• [x] I have performed a self-review of my code.
• [x] I have checked that this code is commented where required.
• [x] I have provided a detailed enough description of this PR.
• [x] I have checked if documentation needs updating.

Documentation

If documentation does need updating either update it by creating a PR (preferred) or request a documentation update.

• User docs: https://github.com/GameServerManagers/LinuxGSM-Docs
• Dev docs: https://github.com/GameServerManagers/LinuxGSM-Dev-Docs

Thank you for your Pull Request!