Description

Custom emojis per channel.

Related issues

[x] I have added a description of the changes in the CHANGELOG files
[x] I have run npm run lint to check that my changes respects the coding conventions
[x] I have added user documentation for the new features I added
[x] I have added technical documentation for the new features I added
[x] I added some documentation and I have run npm run doc:translate to generate translations files