[FEATURE] Add dynamic parameters

[rotten77]

As a user, I want to add dynamic parameters to my snippets, so I can use snippets as a template.

Example snippet:

npx create-react-app %%APP_NAME%%

Before copying the snippet, a modal window with "APP_NAME" text input is displayed. After filling the "APP_NAME", the snipped is copied with the new value.

I appreciate this feature in SnipCommand so my inspiration is from this project: https://github.com/gurayyarar/SnipCommand