feat: add the possibility to also add all files to initial context

lua/chatgpt_nvim/config.lua

@@ -61,6 +61,7 @@ function M.load()
     project_name = "",
     debug = false,
     initial_files = {},
+    include_file_contents = false, -- NEW FLAG: include file contents in prompt if true
     preview_changes = false,
     interactive_file_selection = false,
     partial_acceptance = false,
@@ -119,6 +120,9 @@ function M.load()
         if type(result.initial_files) == "table" then
           config.initial_files = result.initial_files
         end
+        if type(result.include_file_contents) == "boolean" then  -- LOAD NEW FLAG
+          config.include_file_contents = result.include_file_contents
+        end
         if type(result.preview_changes) == "boolean" then
           config.preview_changes = result.preview_changes
         end