fix: try to workaround terminal freeze issues

There's an open issue where there appears to be race conditions when
hitting Ctrl-C during lua deferred functions.

Lots of people were hitting this when using treesitter folding in
terminals.  I was using indent, which may or may not have a similar
problem, but either way I'm happy to disable folding in terminal.

References:

- issue: neovim/neovim#20726
- workaround: neovim/neovim#20726 (comment)

packages/nvim/config/lua/config/auto/terminal.lua

@@ -10,9 +10,7 @@ function M.setup_terminal_window()
 
   win.number = false
   win.relativenumber = false
-
-  local win_config = vim.api.nvim_win_get_config(win_id)
-  local is_not_float = win_config.relative == ""
+  vim.wo.foldmethod = 'manual'
 end
 
 function M.setup()