feat: add a command for search css var by value

[dodio]

Hi there!

I would like to suggest adding a new feature to the CSS Variable Autocomplete extension in VSCode. The feature would be a new command that allows users to insert a CSS variable by searching for a color or other type of value when they don't know the name of the variable.

I believe this feature would greatly improve the usability of the extension and make it easier for users to work with CSS variables.

Please let me know if you have any questions or if there is anything else I can do to help.

hear are some screen shots shows this.

Thank you for your consideration!

[changeset-bot]

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