Merge pull request 'devshell: add terraform-ls' (#227) from terraform-devshell into main

Reviewed-on: #227
Reviewed-by: b12f <b12f@noreply.git.pub.solar>
Reviewed-by: Hendrik Sokolowski <hensoko@noreply.git.pub.solar>

flake.nix

@@ -117,6 +117,7 @@
               treefmt
               nixos-generators
               inputs.nixpkgs-2205.legacyPackages.${system}.terraform
+              terraform-ls
               jq
             ];
           };