The wallet's icon, always a data:image/… URI: EIP-6963 requires a data
URI, and the store drops announcements with any other icon shape — so
consumers can bind it to an img.src without re-validating.
Human-readable wallet name, e.g. 'MetaMask'.
Reverse-DNS wallet id from the announcement, e.g. 'io.metamask'.
An injected wallet's EIP-6963 announcement metadata. Announced means installed and responding — there is no separate "installed" flag.