kakoune: use ripgrep as grep program

user/kakoune/default.nix

@@ -110,6 +110,7 @@ in
           set global scrolloff 10,20
           set global autoreload yes
           set global startup_info_version 99999999
+          set global grepcmd 'rg -Hn'
 
         ''
         + (import ./colors.nix {
@@ -141,6 +142,8 @@ in
       aspell
       aspellDicts.en
       aspellDicts.pt_BR
+
+      ripgrep
     ];
     home.activation = {
       update_kakoune = lib.hm.dag.entryAfter [ "writeBoundary" ] ''