Make variable values more "accessible"

JIRA Internal: BRU-3956

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

The variable overview page (top right eye icon) displays the environment and run-time variables, which is great for an overview.

Lots of times the variable values could be used elsewhere, make it easier to obtain the values:

• remove the double quote character around them - we will remove it anyway and if type (string, number, etc) makes a difference, maybe show it with an icon or different colors
• add "copy to clipboard" button for each of them - even if you leave the double quotes for strings, this button would copy the literal value, no quotes

Mockups or Images of the feature