Wildcard: Add wildcard popover component

Created by: vovakulikov

Closes part of https://github.com/sourcegraph/sourcegraph/issues/27694 Related to https://github.com/sourcegraph/sourcegraph/pull/29054

Context

This PR adds the @floating-ui popover component.

This is an initial implementation of this component without the full support of all possible cases that support the @floating-ui package and without the migration part of our existing popover component (it will be done in a separate PR).