Fix issue in which search palette would hijack the copy command in docs website

[senadir]

Fixes an issue in which if you open the command palette and search for a component, you can no longer copy from the page.

This is because the same event that opens and closes the cmdk palette, also hijacks the cmd+C shortcut to copy the install syntax for a package.

Fixes #7512
Fixes #8071 (possibly; didn't test but symptoms look similar).

Steps to reproduce

1. Open cmd+k, search for a component, say Badge.
2. Go to that page or close the search via esc.
3. Try to select something in the page and copy via cmd+k
4. Notice that your clipboard bun dlx shadcn@latest add badge instead of what you copied`.

Testing steps.

1. Run steps 1->3 above.
2. Notice that your clipboard contain what you selected.

[vercel]

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