Support readonly mode to make debug easier

[shenxiangzhuang]

I have checked the following:

• I've searched existing issues and found nothing related to my issue.

This feature

• blocks me from using Bruno
• would improve my quality of life in Bruno
• is something I've never seen an API client do before

Describe the feature you want to add, and how it would change your usage of Bruno

Add a readonly button to support this situation: test some requests by changing the api params without change the api's settings. IMHO, this is very helpful at debug phrase.

I can do this by "don't save", but it's not convenient.

Mockups or Images of the feature

No response