Prefill Create Offering name from URL query param

[madvas]

URL like https://namebazaar.io/offerings/create?name=bitcoin should prefill name input for creating offering and trigger ownership check.

On ENS name detail. e.g https://namebazaar.io/name/buterinvitalik.eth, or when expanded offering request: If :active-address is :ens.record/owner there should be new link displayed below "Open in Etherscan" and "Add to watched names" -> "Create offering", that will go to create offering page and prefill name input.

This feature will come in handy for prepared Registration feature, so this should be ready before implementing Registration.