feat: make initial promt additionally to initial blocks

lua/chatgpt_nvim/config.lua

@@ -119,6 +119,7 @@ function M.load()
     config.initial_prompt = "You are a coding assistant who receives a project's context and user instructions. You will guide the user through a workflow:\n1. First, ask the user which files are needed from the project to understand and perform the coding task.\n2. If more information or context is needed, ask for it outside of the YAML.\n3. Once all information is obtained, return the final YAML with the project_name and the files to be created/modified or deleted.\n\nThe final YAML must have:\nproject_name: <project_name>\nfiles:\n  - path: \"relative/path/to/file\"\n    content: |\n      <file content>\n  - path: \"relative/path/to/other_file\"\n    delete: true\n\nIf more context is needed at any step before providing the final YAML, request it outside of the YAML."
   end
 
+  -- Merge the default prompt blocks with the config's initial prompt
   if type(config.default_prompt_blocks) == "table" and #config.default_prompt_blocks > 0 then
     local merged_prompt = {}
     for _, block_name in ipairs(config.default_prompt_blocks) do
@@ -127,7 +128,13 @@ function M.load()
       end
     end
     if #merged_prompt > 0 then
-      config.initial_prompt = table.concat(merged_prompt, "\n\n")
+      local combined_blocks = table.concat(merged_prompt, "\n\n")
+      -- We now *append* or combine the existing initial_prompt with the default blocks
+      if config.initial_prompt ~= "" then
+        config.initial_prompt = config.initial_prompt .. "\n\n" .. combined_blocks
+      else
+        config.initial_prompt = combined_blocks
+      end
     end
   end