feat: change default initial prompt, use git root for config file

lua/chatgpt_nvim/init.lua

@@ -1,3 +1,4 @@
+-- lua/chatgpt_nvim/init.lua
 local M = {}
 
 local context = require('chatgpt_nvim.context')
@@ -39,11 +40,18 @@ function M.run_chatgpt_command()
   local current_file_content, current_file_path = context.get_current_file()
   local readme_content = context.get_readme_content()
 
+  -- Make the prompt more readable for the O1 model:
+  -- 1. Include initial prompt and user input at the start.
+  -- 2. Provide a clear project structure section.
+  -- 3. Clearly label the files section.
+  -- 4. The file_sections already include <<<CGPT Current File blocks for each file,
+  --    we just need to ensure there's a clear intro.
+
   local sections = {
     conf.initial_prompt .. "\n" .. user_input,
     "\n\nProject Structure:\n",
     project_structure,
-    "\n\nFiels:\n",
+    "\n\nBelow are the files from the project, each enclosed in <<<CGPT Current File ... >>> blocks for clarity.\n"
   }
 
   table.insert(sections, file_sections)