docs(installation): list every client missing from npm 6.4.0
The installation guide named only dsh, or dsh, kimi and workbuddy, as
needing a newer release. The rea-agents-6.4.0 tag also lacks droid,
qoder, trae and zcode, so setup against @latest rejects all seven as an
unsupported agent integration.
List all seven client IDs in both the registry-check note and the
supported-agents table note.