use hooks for datetime, remove alpinejs

lib/memex_web/components/core_components/date.html.heex

@@ -1,7 +1,3 @@
-<time :if={@date} id={@id} datetime={@date |> Date.to_iso8601(:extended)} x-data={~s<{
-    date:
-      Intl.DateTimeFormat([], {timeZone: 'Etc/UTC', dateStyle: 'short'})
-        .format(new Date("#{Date.to_iso8601(@date, :extended)}"))
-  }>} x-text="date">
-  <%= @date |> Date.to_iso8601(:extended) %>
+<time :if={@date} id={@id} datetime={Date.to_iso8601(@date, :extended)} phx-hook="Date">
+  <%= Date.to_iso8601(@date, :extended) %>
 </time>

lib/memex_web/components/core_components/datetime.html.heex

@@ -1,7 +1,3 @@
-<time :if={@datetime} id={@id} datetime={cast_datetime(@datetime)} x-data={~s/{
-    datetime:
-      Intl.DateTimeFormat([], {dateStyle: 'short', timeStyle: 'long'})
-        .format(new Date("#{cast_datetime(@datetime)}"))
-  }/} x-text="datetime">
+<time :if={@datetime} id={@id} datetime={cast_datetime(@datetime)} phx-hook="DateTime">
   <%= cast_datetime(@datetime) %>
 </time>