User action heatmap (#5131)

* Added basic heatmap data

* Added extra case for sqlite

* Built basic heatmap into user profile

* Get contribution data from api & styling

* Fixed lint & added extra group by statements for all database types

* generated swagger spec

* generated swagger spec

* generated swagger spec

* fixed swagger spec

* fmt

* Added tests

* Added setting to enable/disable user heatmap

* Added locale for loading text

* Removed UseTiDB

* Updated librejs & moment.js

* Fixed import order

* Fixed heatmap in postgresql

* Update docs/content/doc/advanced/config-cheat-sheet.en-us.md

Co-Authored-By: kolaente <konrad@kola-entertainments.de>

* Added copyright header

* Fixed a bug to show the heatmap for the actual user instead of the currently logged in

* Added integration test for heatmaps

* Added a heatmap on the dashboard

* Fixed timestamp parsing

* Hide heatmap on mobile

* optimized postgresql group by query

* Improved sqlite group by statement

public/vendor/plugins/calendar-heatmap/calendar-heatmap.css

@@ -0,0 +1,27 @@
+text.month-name,
+text.calendar-heatmap-legend-text,
+text.day-initial {
+  font-size: 10px;
+  fill: inherit;
+  font-family: Helvetica, arial, 'Open Sans', sans-serif;
+}
+rect.day-cell:hover {
+  stroke: #555555;
+  stroke-width: 1px;
+}
+.day-cell-tooltip {
+  position: absolute;
+  z-index: 9999;
+  padding: 5px 9px;
+  color: #bbbbbb;
+  font-size: 12px;
+  background: rgba(0, 0, 0, 0.85);
+  border-radius: 3px;
+  text-align: center;
+}
+.day-cell-tooltip > span {
+  font-family: Helvetica, arial, 'Open Sans', sans-serif
+}
+.calendar-heatmap {
+  box-sizing: initial;
+}