fix: add project name to initial prompt, improve basic prompt

lua/chatgpt_nvim/prompts.lua

@@ -289,7 +289,7 @@ local M = {
     - If multiple tools are needed, list them sequentially in the `tools` array.
     - Always run at least one tool (e.g., `readFile`, `editFile`, `executeCommand`), exept you have finished.
     - Always just include one yaml in the response with all the tools you want to run in that yaml.
-    - Never do write operations on a file which you have not read before.
+    - Never do write operations on a file which you have not read before. Its contents must be in your context before writing. This does not apply if you create a new file.
     - The plugin will verify the `project_name` is correct before running any tools.
     - If the response grows too large, I'll guide you to break it into smaller steps.
   ]],