Add dedicated tabs for package version history and changelog

[MythicManiac]

This PR introduces the following two new tabs on the package detail page:

• Changelog
• Version history

The main goal is to increase the user experience and rendering performance especially for packages with a large amount of content on their page.

MERGE #992 FIRST

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (6f75f3f) 93.07% compared to head (d2cb74c) 93.08%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## package-detail-mixin #993 +/- ## ===================================================== Coverage 93.07% 93.08% ===================================================== Files 305 307 +2 Lines 8746 8758 +12 Branches 776 776 ===================================================== + Hits 8140 8152 +12 Misses 501 501 Partials 105 105 ```

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