feat: use @Mic92 retiolum module

the old one did this:

building '/nix/store/gqvr8gl8ayj9kgjnfr23ax0xpc3rnc34-unit-tinc.retiolum.service.drv'...
error: executing '/nix/store/4xw8n979xpivdc46a9ndcvyhwgif00hz-bash-5.1-p16/bin/bash': Argument list too long
error: builder for '/nix/store/gqvr8gl8ayj9kgjnfr23ax0xpc3rnc34-unit-tinc.retiolum.service.drv' failed with exit code 1
error: 1 dependencies of derivation '/nix/store/v2ld4847xyb49v7wjb3fvf6lkg2j755b-system-units.drv' failed to build
error: 1 dependencies of derivation '/nix/store/bbl9qidw9z0gz56z7yrhfkxsawk5qi7x-etc.drv' failed to build

systems/ful/configuration.nix

@@ -13,7 +13,7 @@ in {
     <niveum/configs/save-space.nix>
     <niveum/configs/spacetime.nix>
     <niveum/configs/sshd.nix>
-    <niveum/modules/retiolum.nix>
+    <retiolum/modules/retiolum>
   ];
 
   nix.nixPath = ["/var/src"];

systems/makanek/configuration.nix

@@ -29,7 +29,7 @@ in {
     <niveum/configs/spacetime.nix>
     <niveum/configs/sshd.nix>
     <niveum/configs/telegram-bots>
-    <niveum/modules/retiolum.nix>
+    <retiolum/modules/retiolum>
     <niveum/modules/passport.nix>
   ];
 

systems/tabula/configuration.nix

@@ -8,7 +8,7 @@ in {
   imports = [
     ./hardware-configuration.nix
     <niveum/configs/spacetime.nix>
-    <niveum/modules/retiolum.nix>
+    <retiolum/modules/retiolum>
     <niveum/configs/sshd.nix>
   ];
 

systems/tahina/configuration.nix

@@ -8,7 +8,7 @@ in {
   imports = [
     ./hardware-configuration.nix
     <niveum/configs/spacetime.nix>
-    <niveum/modules/retiolum.nix>
+    <retiolum/modules/retiolum>
     <niveum/configs/sshd.nix>
   ];
 

systems/zaatar/configuration.nix

@@ -27,7 +27,7 @@ in {
     # <niveum/configs/traadfri.nix>
     <niveum/configs/tmux.nix>
     <niveum/configs/wpa_supplicant.nix>
-    <niveum/modules/retiolum.nix>
+    <retiolum/modules/retiolum>
   ];
 
   services.restic.backups.moodle-dl = {