vicinae: support Home Manager module alongside upstream module (#2068)

Support the Home Manager module via programs.vicinae alongside the
upstream module's services.vicinae namespace.

Unifying both modules is continued in [1] ("vicinae: move from programs
to services").

[1]: https://github.com/nix-community/home-manager/pull/8313

Closes: https://github.com/nix-community/stylix/issues/2076
Link: https://github.com/nix-community/stylix/pull/2068

Reviewed-by: 0xda157 <da157@voidq.com>
Reviewed-by: NAHO <90870942+trueNAHO@users.noreply.github.com>
(cherry picked from commit a4406d9799)

modules/vicinae/hm.nix

@@ -5,12 +5,20 @@
   ...
 }:
 mkTarget {
-  config = lib.optionals (options.services ? vicinae) [
-    (
-      { colors, polarity }:
-      {
-        services.vicinae = {
+  config =
+    let
+      eachConfig =
+        config:
+        lib.genAttrs [ "services" "programs" ] (
+          source: lib.optionalAttrs (options.${source} ? vicinae) { vicinae = config; }
+        );
+    in
+    [
+      (
+        { colors, polarity }:
+        eachConfig {
           settings.theme.name = "stylix";
+
           themes.stylix = {
             meta = {
               name = "stylix";
@@ -45,14 +53,8 @@ mkTarget {
               };
             };
           };
-        };
-      }
-    )
-    (
-      { opacity }:
-      {
-        services.vicinae.settings.window.opacity = opacity.popups;
-      }
-    )
-  ];
+        }
+      )
+      ({ opacity }: eachConfig { settings.window.opacity = opacity.popups; })
+    ];
 }

modules/vicinae/testbeds/vicinae-integrated.nix

@@ -0,0 +1,14 @@
+{ lib, ... }:
+{
+  stylix.testbed.ui = {
+    graphicalEnvironment = "hyprland";
+    command.text = "sleep 5 && vicinae open";
+  };
+
+  home-manager.sharedModules = lib.singleton {
+    programs.vicinae = {
+      enable = true;
+      systemd.enable = true;
+    };
+  };
+}