💡 Improve search matches

[vemonet]

Describe the feature

The current search matches could be improved:

• It does not match on letter with accents when using the equivalent without accent, which can be quite painful with some languages (e.g. in french "tete" will not match "tête")
• It does not match inside words (e.g. writing "plane" will not match "airplane")

An idea of implementation

We will need to directly bring changes to https://github.com/missive/emoji-mart

But it seems that the maintainer has not committed for more than 6 months, so we might need to fork and use our fork, if the repo is not maintained anymore

Or look into another one that is maintained: https://nolanlawson.github.io/emoji-picker-element/ (but does not look as good as emoji-mart)