Track recently used emojis

[nightkr]

Context

No response

Describe your suggested feature

Emojis are kind of a pain to navigate, we should show the most recently used ones.

This will have to be opt-in due to the privacy policy (and it should be amended to carve out local opt-in tracking).

Other details

No response

Acknowledgements

• [X] I have searched the existing issues and this is a new one, NOT a duplicate or related to another open issue.
• [X] This is a single feature request, in case of multiple feature requests I will open a separate issue for each one (they can always link to each other if related)
• [X] I have written a short but informative title.
• [X] I have checked through the app settings for my feature.
• [X] I will fill out all of the requested information in this form.

[nightkr]

This issue has been migrated to Codeberg: see https://codeberg.org/natkr/flickboard/issues/42 for any further discussion!