tahani: add headless niri workstation with Sunshine streaming

profiles/niri.nix

@@ -0,0 +1,18 @@
+{...}: {
+	xdg.configFile."niri/config.kdl".text = ''
+		input {
+			keyboard {
+				xkb {
+					layout "us"
+				}
+			}
+		}
+
+		binds {
+			Mod+Return { spawn "ghostty"; }
+			Mod+B { spawn "firefox"; }
+			Mod+Shift+Q { close-window; }
+			Mod+Shift+E { quit; }
+		}
+	'';
+}