Activity integration

[juliusknorr]

• Resolves: Activity logs [$10 awarded] #211
• Target version: master

Summary

Implement integration to the Nextcloud activity app.

TODO

• Emit activity events for board changes
• Load activity entries in the board sidebar
• Load activity entries in the card sidebar
• Fetch card activities on the board sidebar as well
• Adjust tests for service classes
• Test: \OCA\Deck\Activity

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Documentation (manuals or wiki) has been updated or is not required

[codecov]

Codecov Report

Merging #607 into master will increase coverage by 0.6%.
The diff coverage is 78.21%.

@@ Coverage Diff @@## master #607 +/- ##
=========================================
+ Coverage 75.46% 76.07% +0.6% 
=========================================
Files 52 57 +5 Lines 1969 2474 +505 =========================================
+ Hits 1486 1882 +396 - Misses 483 592 +109

[juliusknorr]

Merging this as a first iteration, so we'll get translations and have it in the daily build already.