added templating support

changed ping command to use templates
added userjoin/userleave event
added guild to command context
refactored post target service
added logging output to initial loading
added server_id to postTarget
added leave log postTarget

abstracto-application/command/command-management/src/main/java/dev/sheldan/abstracto/commands/management/CommandReceivedHandler.java

@@ -42,6 +42,7 @@ public class CommandReceivedHandler extends ListenerAdapter {
         Parameters parsedParameters = getParsedParameters(unparsedParameter, foundCommand, event.getMessage());
         Context context = Context.builder()
                 .author(event.getAuthor())
+                .guild(event.getGuild())
                 .channel(event.getTextChannel())
                 .message(event.getMessage())
                 .parameters(parsedParameters)