refactor(modules): reduce host repetition

modules/_lib/hosts.nix

@@ -0,0 +1,34 @@
+{
+	den,
+	lib,
+}: {
+	mkUserHost = {
+		system,
+		host,
+		user,
+		userAspect ? "${host}-${user}",
+		includes ? [],
+		homeManager ? null,
+	}:
+		(lib.setAttrByPath ["den" "hosts" system host "users" user "aspect"] userAspect)
+		// (lib.setAttrByPath ["den" "aspects" userAspect] ({inherit includes;}
+				// lib.optionalAttrs (homeManager != null) {
+					inherit homeManager;
+				}));
+
+	mkPerHostAspect = {
+		host,
+		includes ? [],
+		darwin ? null,
+		nixos ? null,
+	}:
+		lib.setAttrByPath ["den" "aspects" host "includes"] [
+			(den.lib.perHost ({inherit includes;}
+					// lib.optionalAttrs (darwin != null) {
+						inherit darwin;
+					}
+					// lib.optionalAttrs (nixos != null) {
+						inherit nixos;
+					}))
+		];
+}