settings for output result(ast tree)#146

### Clear and concise description of the problem Thanks for work! Would you like to consider adding settings for output result panel(ast tree), such as changing its fontsize? ### Suggested solution ... ### Alternative _No response_ ### Additional context _No response_ ### Validations - [x] Follow our [Code of Conduct](https://github.com/sxzz/.github/blob/main/CODE_OF_CONDUCT.md) - [x] Read the [Contributing Guide](https://github.com/sxzz/contribute). - [x] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.