Show git-notes (#6984)

* Show git-notes

* Make git-notes heading text localizable

* Refactor git-notes data fetching to a separate function

* Display the author and time of git notes

* Move note bubble inside the commit bubble

* Revert "Move note bubble inside the commit bubble"

This reverts commit c0951fe0e3.

* Add test for git-notes

* testing ui

* Polish CSS

* Apply suggestions from code review

Co-Authored-By: Lauris BH <lauris@nix.lv>

modules/git/tests/repos/repo1_bare/objects/ca/6b5ddf303169a72d2a2971acde4f6eea194e5c

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modules/git/tests/repos/repo1_bare/refs/notes/commits

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