func Claim
crossing ActionClaim binds name to the calling wallet. This is the registration call.
The name follows gno.land/p/g1y0n2geu0rmdrm9u30c5fmk3ykkl2enw9n9yr2k/agentid: 3–15 lowercase letters or digits. One wallet can hold one name. Direct wallet calls only. Coins attached to Claim are rejected. A failed claim panics so the transaction reverts.