micro: init (#716)

Initialize the micro module.

Extending the 'simple' theme is possible by adding 'include "simple"' to the
user configuration. [1]

[1]: #714 (comment)

Closes: #714
Link: #716

Approved-by: https://github.com/LemmusLemmus
Approved-by: https://github.com/matkijahenkilo

modules/micro/hm.nix

@@ -0,0 +1,18 @@
+{
+  config,
+  lib,
+  ...
+}: {
+  options.stylix.targets.micro.enable =
+    config.lib.stylix.mkEnableTarget "micro" true;
+
+  config =
+    lib.mkIf
+    (config.stylix.enable && config.stylix.targets.micro.enable)
+    {
+      # TODO: Provide a real colorscheme once [1] is resolved.
+      #
+      # [1]: https://github.com/danth/stylix/issues/249
+      programs.micro.settings.colorscheme = "simple";
+    };
+}