Add support for more generic notification

This is a start to have different kinds of notifications. It is
possible to be notified via e-mail, matrix or gotify. It also extends
the current "periodic query" for due items by allowing notification
over different channels. A "generic periodic query" variant is added
as well.

modules/totp/src/main/scala/docspell/totp/Totp.scala

@@ -49,9 +49,9 @@ object Totp {
           time.plus(generator.getTimeStep)
         )
 
-      def checkPassword(key: Key, given: OnetimePassword, time: Instant): Boolean = {
+      def checkPassword(key: Key, givenPass: OnetimePassword, time: Instant): Boolean = {
         val pass = generate(key, time)
-        pass == given
+        pass == givenPass
       }
     }