Adds new plugin [alexarch21/history-explorer-card] (#1182)

Co-authored-by: alexarch21 <alexarch21>
Co-authored-by: Joakim Sørensen <joasoe@gmail.com>

plugin

@@ -4,6 +4,7 @@
   "adizanni/floor3d-card",
   "aex351/home-assistant-neerslag-card",
   "AitorDB/home-assistant-sun-card",
+  "alexarch21/history-explorer-card",
   "amaximus/bkk-stop-card",
   "amaximus/fkf-garbage-collection-card",
   "amaximus/garbage-collection-card",
@@ -240,4 +241,4 @@
   "wassy92x/lovelace-digital-clock",
   "wassy92x/lovelace-entities-btn-group",
   "wassy92x/lovelace-ha-dashboard"
-]
+]