feat: Aiderに選択したテキストを読み取り専用コンテキストとして追加

README.md

@@ -132,6 +132,7 @@ To use aider.vim, you can run the following commands within Vim or Neovim:
 - `:AiderSilentAddCurrentFileReadOnly` - Silently adds the current file as read-only to aider's context.
 - `:AiderExit` - Exits aider and cleans up the session.
 - `:AiderVisualTextWithPrompt` - Edit the selected text in visual mode in a floating window and send it to aider. In the floating window, send to aider with `<CR>` in normal mode, and close the floating window with `Q`. You can also backup prompt with `q`.
+- `:AiderAddPartialReadonlyContext` - Adds the selected text in visual mode as read-only context to Aider.
 - `:AiderAddWeb` - Displays a prompt for the specified URL and adds it to the aider context.
 - `:AiderOpenIgnore` - Opens the `.aiderignore` file in the git root directory if it exists.
 - `:AiderAddIgnoreCurrentFile` - Adds the current file to the `.aiderignore`.