add alacritty configuration

home/alacritty.nix

@@ -0,0 +1,17 @@
+{pkgs, ...}: {
+  programs.alacritty = {
+    enable = true;
+    settings = {
+      font.size = 12;
+      terminal.shell = {
+        args = ["new-session" "-A" "-s" "general"];
+        program = pkgs.tmux;
+      };
+      window = {
+        decorations = "None";
+        opacity = 1;
+        startup_mode = "Maximized";
+      };
+    };
+  };
+}

home/home.nix

@@ -1,5 +1,6 @@
 {config, ...}: {
   imports = [
+    ./alacritty.nix
     ./tmux
     ./git.nix
     ./ssh.nix