fix: change path handling

.chatgpt_config.yaml

@@ -1,4 +1,4 @@
 default_prompt_blocks:
-  - "basic prompt"
+  - "basic-prompt"
 directories:
   - "."

lua/chatgpt_nvim/context.lua

@@ -67,7 +67,7 @@ function M.get_project_files(directories)
 
   local rel_files = {}
   for _, f in ipairs(all_files) do
-    local rel = f:gsub("^" .. root .. "/", "")
+    local rel = vim.fn.fnamemodify(f, ":.")
     table.insert(rel_files, rel)
   end
 
@@ -102,27 +102,4 @@ function M.get_file_contents(files)
   return table.concat(sections, "\n")
 end
 
-function M.get_current_file()
-  local current_path = vim.fn.expand("%:p")
-  if current_path == "" then
-    return nil, nil
-  end
-  local fd = uv.fs_open(current_path, "r", 438)
-  if not fd then return nil, current_path end
-  local stat = uv.fs_fstat(fd)
-  local data = uv.fs_read(fd, stat.size, 0)
-  uv.fs_close(fd)
-  return data, current_path
-end
-
-function M.get_readme_content()
-  local root = vim.fn.getcwd()
-  local fd = uv.fs_open(root .. "/README.md", "r", 438)
-  if not fd then return nil end
-  local stat = uv.fs_fstat(fd)
-  local data = uv.fs_read(fd, stat.size, 0)
-  uv.fs_close(fd)
-  return data
-end
-
 return M