♻️ 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

.clj-kondo/config.edn

@@ -45,10 +45,16 @@
   :potok/reify-type
   {:level :error}
 
+  :missing-protocol-method
+  {:level :off}
+
   :unresolved-namespace
   {:level :warning
    :exclude [data_readers]}
 
+  :unused-value
+  {:level :off}
+
   :single-key-in
   {:level :warning}
 
@@ -64,6 +70,9 @@
   :redundant-nested-call
   {:level :off}
 
+  :redundant-str-call
+  {:level :off}
+
   :earmuffed-var-not-dynamic
   {:level :off}