* feat: group by date
* test: added more tests for group by date
* fix: print month in abbrev format
* chore: adapt group event changes
* style: remove comment
* fix: change date on changing group
* fix: dont count time in relative group
* fix: check beginning of month is within 30 days
* refactor: unify group id date format
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Co-authored-by: nathan <nathan@appflowy.io>
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