feat: use opentofu instead of terraform

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

config/plugins/lsp/lsp.nix

@@ -40,6 +40,9 @@
         };
         terraformls = {
           enable = true;
+          settings = {
+            terraform.path = "${pkgs.opentofu.path}/bin/tofu";
+          };
         };
         ansiblels = {
           enable = true;