♻️ Refactor time related namespaces

Mainly removes the custom app.util.time namespace
from frontend and backend and normalize all to use
the app.common.time namespace

backend/dev/user.clj

@@ -30,7 +30,7 @@
    [app.srepl.helpers :as srepl.helpers]
    [app.srepl.main :as srepl]
    [app.util.blob :as blob]
-   [app.util.time :as dt]
+   [app.common.time :as ct]
    [clj-async-profiler.core :as prof]
    [clojure.contrib.humanize :as hum]
    [clojure.java.io :as io]