[Feature] Ability to specify variables in prompt

**Is your feature request related to an issue? Please describe.**
No I Want A New Feature

**Describe your desired solution**
I want the ability to specify various variables when we add prompt example prompt "There is a product name: "{{Product Name}}" I need to make a description of this product according to the product title I want from you and the following features ....." {{Product Name}} When prompt is selected, the variable is filled with an input from the user, and the user can define more than one variable while preparing his own prompt.

**Describe the alternatives you are considering**
You can change the feature I want according to your own convenience

In addition, I saw this feature in a project on github before. I ask you to add it as it will be very useful for me to be in this project.