feat(hurl): use global config for finding environment files

Closed #161.
This change allows for greater flexibility and configurability, as users
can now potentially customize the function used to find environment
files by modifying the global configuration. This could be useful in
scenarios where the default method of locating environment files is not
suitable.

lua/hurl/init.lua

@@ -15,6 +15,7 @@ local default_config = {
     height = 40,
   },
   env_file = { 'vars.env' },
+  find_env_files_in_folders = utils.find_env_files_in_folders,
   formatters = {
     json = { 'jq' },
     html = {

lua/hurl/main.lua

@@ -104,7 +104,7 @@ local function execute_hurl_cmd(opts, callback)
 
   -- Check vars.env exist on the current file buffer
   -- Then inject the command with --variables-file vars.env
-  local env_files = utils.find_env_files_in_folders()
+  local env_files = _HURL_GLOBAL_CONFIG.find_env_files_in_folders()
   for _, env in ipairs(env_files) do
     utils.log_info(
       'hurl: looking for ' .. vim.inspect(_HURL_GLOBAL_CONFIG.env_file) .. ' in ' .. env.path