feat: basic setup with all packages

modules/core/ui/login.py

@@ -0,0 +1,30 @@
+from typing import Literal
+
+import decman
+from decman.plugins import pacman, systemd
+
+
+class LoginManager(decman.Module):
+    def __init__(self, platform: Literal["desktop", "laptop"]):
+        """Base packages that should never be uninstalled"""
+        self._platform: Literal["desktop", "laptop"] = platform
+        super().__init__("base")
+
+    @pacman.packages
+    def pkgs(self) -> set[str]:
+        if self._platform == "desktop":
+            return {
+                "greetd",
+                "greetd-tuigreet",
+            }
+        else:
+            return {"gdm"}
+
+    # TODO: Config files for laptop and desktop
+
+    @systemd.units
+    def units(self) -> set[str]:
+        if self._platform == "desktop":
+            return {"greetd.service"}
+        else:
+            return {"gdm.service"}