feat: started working on auto refresh of activity page

[ErikBjare]

Had this in my working tree for along time. Not ready and not sure if it's a good idea, but thought I should open a PR for it regardless.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 4.43%. Comparing base (23b2074) to head (96de709).
⚠️ Report is 520 commits behind head on master.

Additional details and impacted files

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##           master    #255   +/-   ##
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  Coverage    4.43%   4.43%           
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  Files          21      21           
  Lines         969     969           
  Branches       94      94           
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  Hits           43      43           
  Misses        869     869           
  Partials       57      57           

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[johan-bjareholt]

Personally I wouldn't care about an auto refresh every 30s, especially considering that weekly/monthly queries are very demanding.

Maybe if I have an activitywatch tab open which I go back to after an hour it would be cool if it reloaded, but I can also see how it could be annoying.

[nicolae-stroncea]

A possibly less demanding option is to have a text field "UI is outdated" that appears next to Refresh button if data has not been refreshed for past 5 minutes, thus letting user know they should Refresh. That said, I can see a use case for the auto-refresh setting if somebody has the webpage in view/on another monitor and wants to see their activity live.