add jsonfmt

Author: jonathanmorley

treefmt.nix

@@ -1,3 +1,5 @@
+# See available programs from https://github.com/numtide/treefmt-nix/tree/main/programs
+
 {inputs, ...}: {
   imports = [inputs.treefmt-nix.flakeModule];
   perSystem = {
@@ -13,6 +15,7 @@
       ];
       programs.actionlint.enable = true; # github action linter
       programs.alejandra.enable = true; # nix
+      programs.jsonfmt.enable = true; # json
       programs.mdformat.enable = true; # markdown
       programs.rustfmt.enable = true; # rust
       programs.taplo.enable = true; # toml