extra: nvim: add autocmd to appropriately set filetype for typst files

Signed-off-by: Christoph Heiss <christoph@c8h4.io>

extra/nvim/lua/autocmds.lua

@@ -92,6 +92,14 @@ vim.api.nvim_create_autocmd('FileType', {
   end,
 })
 
+-- Set appropriate filetype for Typst such that treesitter can do its thing
+vim.api.nvim_create_autocmd('BufReadPost', {
+  pattern = '*.typ',
+  callback = function()
+    vim.bo.ft = 'typst'
+  end,
+})
+
 -- Automatically switch between absolute and relative line numbers when
 -- entering insert mode
 local numbertoggle_group = vim.api.nvim_create_augroup('numbertoggle', {})