added starship

pkgs/starship/biscuit.nix

@@ -0,0 +1,63 @@
+{...}: {
+  programs.starship = {
+    enable = true;
+    settings = {
+      add_newline = true;
+      format = ''
+        $username\
+        $hostname\
+        $directory\
+        $git_branch\
+        $git_state\
+        $git_status\
+        $cmd_duration\
+        $line_break\
+        $python\
+        $character'';
+      # Optional: You can set right_format = "" if you want
+      right_format = "";
+
+      directory = {
+        style = "blue";
+      };
+
+      character = {
+        success_symbol = "[❯](purple)";
+        error_symbol = "[❯](red)";
+        vimcmd_symbol = "[❮](green)";
+      };
+
+      git_branch = {
+        format = "[$branch]($style)";
+        style = "bright-black";
+      };
+
+      git_state = {
+        format = "([$state( $progress_current/$progress_total)]($style)) ";
+        style = "bright-black";
+      };
+
+      git_status = {
+        format = "  ($ahead_behind$stashed)]($style)";
+        style = "cyan";
+        conflicted = "​"; # zero-width space
+        untracked = "​";
+        modified = "​";
+        staged = "​";
+        renamed = "​";
+        deleted = "​";
+        stashed = "≡";
+      };
+
+      cmd_duration = {
+        format = "[$duration]($style) ";
+        style = "yellow";
+      };
+
+      python = {
+        format = "[$virtualenv]($style) ";
+        style = "bright-black";
+      };
+    };
+  };
+}