Remove prefixing characters when copying code block for CLI usage

[xet-a]

Description:
Currently, when the Copy Button is clicked to copy a code block that starts with $, the value includes $ in the copied text. This can cause inconvenience for users transitioning to the CLI.

The enhancement request is to improve the Copy Button functionality to automatically remove prefixing characters like $ (including a space) when copying values for CLI usage. This modification would streamline the process for users who often need to copy values to run commands in the CLI.

Why:
To enhance user experience and improve the efficiency of copying values from the application to the CLI interface.