plugins/actions-preview: add description

Author: osbm

plugins/by-name/actions-preview/default.nix

@@ -3,6 +3,7 @@ lib.nixvim.plugins.mkNeovimPlugin {
   name = "actions-preview";
   packPathName = "actions-preview.nvim";
   package = "actions-preview-nvim";
+  description = "Fully customizable previewer for LSP code actions.";
 
   maintainers = [ lib.maintainers.GaetanLepage ];