v1.0.0 Google Calendar Plugin

[fmartingr]

Summary

This pull request introduces the v1.0.0 Google Calendar release created in the https://github.com/mattermost/mattermost-plugin-mscalendar repository as groundwork for sharing common code for similar plugins.

This PR leverages the work done in that plugin to allow some of the features and allow compatibility with HA environments, check the README.md for more details on features.

[hanzei]

50k lines of code is a bit too much to review in one PR. What are the files that I specifically should take a look at?

[fmartingr]

50k lines of code is a bit too much to review in one PR. What are the files that I specifically should take a look at?

Code is mostly the same we had in the mscalendar plugin, so the main server, and that general things for the plugin are in place and I haven't forgot to migrate anything.

Not asking for an in-depth review of course, just that what I migrated makes sense, logic was reviewed some time ago.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

❗ No coverage uploaded for pull request base (master@ac997a6). Click here to learn what that means.

Additional details and impacted files

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  Files             ?       16           
  Lines             ?      606           
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  Hits              ?       68           
  Misses            ?      536           
  Partials          ?        2           

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[mickmister]

Reusing the same repo as the archived one seems weird, but I saw the discussion on it and I suppose that's the plan we're going with. What was your method of getting the code onto this repo?

[fmartingr]

Reusing the same repo as the archived one seems weird, but I saw the discussion on it and I suppose that's the plan we're going with. What was your method of getting the code onto this repo?

I'd rather go with this without breaking release semver (which we are not) than having a lot of repositores for the same thing. And we are going to have the history anyway.

Essentially, I removed all the files and replaced them with the ones from the Google Calendar plugin PoC that I did the other day.

[fmartingr]

Adding the Docs/Needed label since the repository URL has changed, and to get some eyes on the README.md.