Add navi deployment module and integrate SSH inventory for remote management

- Introduced a new `navi` module for managing deployments across multiple hosts.
- Enhanced SSH inventory management to support public key application for authorized hosts.
- Configured system deployment builder for seamless integration with Navi.
- Updated various host configurations to enable deployment capabilities and streamline SSH access.

modules/system/users/catalog-default.nix

@@ -77,6 +77,20 @@
             };
           };
         };
+
+        builder = {
+          isNormalUser = true;
+          description = "Navi fleet deploy (push + activate only)";
+          extraGroups = [ ];
+          createHome = false;
+
+          homeManager = {
+            enable = false;
+            module = null;
+          };
+
+          ssh.inbound.enable = true;
+        };
       };
     };
 }