nvim/typst: lazyload snippets only once

.config/nvim/ftplugin/typst.lua

@@ -2,6 +2,9 @@ vim.bo.shiftwidth = 2
 vim.bo.tabstop = 2
 vim.bo.textwidth = 100
 
+local once = require("once")
+
+once.test_and_load("ft_typst", function()
     vim.keymap.set("n", "<leader>f", function()
         local saved = vim.fn.winsaveview()
         vim.cmd([[silent exec "%!typstyle -c 100"]])
@@ -34,3 +37,4 @@ do
             }),
         })
     end
+end)