nvim: improve cspell.json file handling

This doesn't handle looking for workspace level files, but will stop
the "Add word to dictionary" code action from creating random
cspell.json files in whatever vim considers to be the current working
directory.

Eventually, I'd like to move this all into neoconf.json, but this is
better than the current, non functional state

nvim/lua/psoxizsh/plugins/ide.lua

@@ -144,8 +144,12 @@ return {
 
         -- CSpell setup
         local cspell = require 'cspell'
+        local cspell_config_json = function(_)
+          return vim.fn.stdpath('config') .. '/cspell.json'
+        end 
         local cspell_opts = {
           config = {
+            find_json = cspell_config_json,
             on_add_to_json = function(payload)
               if vim.fn.executable('jq') == 0 then return end
 
@@ -172,6 +176,12 @@ return {
           end,
         }
 
+        -- Ensure our config file exists, otherwise cspell complains
+        local uv = (vim.uv or vim.loop);
+        if not uv.fs_stat(cspell_config_json()) then
+          vim.fn.writefile({'{}'}, cspell_config_json())
+        end
+
         opts.sources = vim.tbl_extend('force', opts.sources or {}, {
           cspell.diagnostics.with(cspell_opts),
           cspell.code_actions.with(cspell_opts),