nvim: add json formatter

modules/programs/nvim/default.nix

@@ -40,6 +40,7 @@ in
           alejandra
           black
           isort
+          jq
           nil
           nixpkgs-fmt
           rustfmt

modules/programs/nvim/init.lua

@@ -193,11 +193,10 @@ require("formatter").setup({
   log_level = vim.log.levels.WARN,
   -- All formatter configurations are opt-in
   filetype = {
-    -- Formatter configurations for filetype "lua" go here
-    -- and will be executed in order
+    json = {
+      require("formatter.filetypes.json").jq,
+    },
     lua = {
-      -- "formatter.filetypes.lua" defines default configurations for the
-      -- "lua" filetype
       require("formatter.filetypes.lua").stylua,
     },
     nix = {