fix(cheetah)!: nixpkgs.overlays && gpg

Fix `gpg` as `ssh` setup (also add `openssh` to `home.packages`)
Remove `j` (breaking, cannot build)

machines/nix-on-droid/aarch64-linux/cheetah/configuration.nix

@@ -18,7 +18,7 @@
   system.stateVersion = "22.11";
 
   nix.extraOptions = ''
-    experimental-features = nix-command flakes repl-flake
+    experimental-features = nix-command flakes repl-flake recursive-nix
     keep-outputs = true
     keep-derivations = true
   '';

machines/nix-on-droid/aarch64-linux/cheetah/home.nix

@@ -27,6 +27,7 @@
     # clang
     gcc
 
+    openssh
     diffutils
     findutils
     utillinux
@@ -72,7 +73,7 @@
     # emacs
 
     #
-    j
+    # j
   ];
 
   programs.neovim = {
@@ -104,6 +105,7 @@
     enable = true;
     username = "reo101";
     hostname = "cheetah";
+    atuin = true;
     direnv = true;
     zoxide = true;
   };
@@ -118,16 +120,18 @@
     enable = true;
     userName = "reo101";
     userEmail = "pavel.atanasov2001@gmail.com";
+    signing = {
+      signByDefault = true;
+      key = "675AA7EF13964ACB";
+    };
   };
 
   services.gpg-agent = {
     enable = true;
-    defaultCacheTtl = 1800;
+    defaultCacheTtl = 86400;
+    maxCacheTtl = 86400;
+    pinentryFlavor = "tty";
     enableSshSupport = true;
+    sshKeys = ["CFDE97EDC2FDB2FD27020A084F1E3F40221BAFE7"];
   };
-
-  # Using nix-direnv
-  # services.lorri = {
-  #   enable = true;
-  # };
 }