chore: add ssh config

config/default.nix

@@ -4,5 +4,6 @@
     ./bash.nix
     ./git.nix
     ./starship.nix
+    ./ssh.nix
   ];
 }

config/ssh.nix

@@ -0,0 +1,20 @@
+{ ... }:
+
+{
+  programs.ssh = {
+    enable = true;
+    compression = true;
+    serverAliveInterval = 60;
+    serverAliveCountMax = 3;
+
+    # SSH Multiplexing - reuses existing SSH connections for multiple sessions, reducing authentication overhead and improving speed for subsequent logins.
+    controlPath = "~/.ssh/master-%r@%n:%p";
+    controlMaster = "auto";
+    controlPersist = "600";
+
+    # Include custom configs from 1Password (See packages/common/secrets.nix)
+    includes = [
+      "~/.ssh/config.d/*.conf"
+    ];
+  };
+}