modularize cinny and ente-auth, add package ente-auth-web

The previous was more of a workaround not fitting in the spirit of
nixos, this fixes this and makes proper modules out of them. Sadly
ente-web-auth has to be build with a env var and therefore can't be
configured before properly.

systems/x86_64-linux/blarm/default.nix

@@ -53,7 +53,8 @@ with lib.${namespace};
   awesome-flake = {
     services = {
       ssh = enabled;
-      caddy = enabled;
+      cinny = enabled;
+      ente-auth = enabled;
       restic = enabled;
     };