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

lua/chatgpt_nvim/config.lua

@@ -1,11 +1,25 @@
+-- lua/chatgpt_nvim/config.lua
+-- Modified to load the config file from the git root of the currently opened file
+-- If not in a git repository, fallback to current working directory
+
 local M = {}
 local uv = vim.loop
 
 local ok_yaml, lyaml = pcall(require, "lyaml")
 
+local function get_project_root()
+  -- Attempt to find git root
+  local git_root = vim.fn.systemlist('git rev-parse --show-toplevel')
+  if vim.v.shell_error == 0 and git_root and #git_root > 0 then
+    return git_root[1]
+  end
+  -- Fallback to current working directory if git root not found
+  return vim.fn.getcwd()
+end
+
 local function get_config_path()
-  local cwd = vim.fn.getcwd()
-  local config_path = cwd .. "/.chatgpt_config.yaml"
+  local root = get_project_root()
+  local config_path = root .. "/.chatgpt_config.yaml"
   return config_path
 end
 
@@ -34,7 +48,7 @@ function M.load()
     end
   end
   return {
-    initial_prompt = "",
+    initial_prompt = "  You are a coding assistant who receives a project’s context and user instructions. The user will provide a prompt, and you will return modifications to the project in a YAML structure. This YAML must have a top-level key named files, which should be a list of file changes. Each element in files must be a mapping with the keys path and content. The path should be the file path relative to the project’s root directory, and content should contain the new file content as a multiline string (using the YAML | literal style). Do not include additional commentary outside of the YAML.\n  Here is the structure expected in your final answer:\n    files:\n      - path: \"relative/path/to/file1.ext\"\n        content: |\n          <full file content here>\n      - path: \"relative/path/to/file2.ext\"\n        content: |\n          <full file content here>\n  Based on the prompt and project context provided, you must only return the YAML structure shown above (with actual file paths and contents substituted in). Any file that should be created or modified must appear as one of the files entries. The content should contain the complete and final code for that file, reflecting all changes requested by the user.",
     directories = { "." },
   }
 end