Add an interactive Raft setup flow for hermes gateway setup. The wizard follows the existing platform adapter setup pattern, persists RAFT_PROFILE to the Hermes env file, preserves an existing profile when the user declines reconfiguration, and registers the flow via setup_fn.
Add focused Raft adapter coverage for saving RAFT_PROFILE, keeping an existing profile, and registering setup_fn.
Signed-off-by: skyzh <skyzh@mail.build>
Signed-off-by: HaoHao <HaoHao@mail.build>
Adds a Raft platform adapter as a bundled plugin (plugins/platforms/raft/)
connecting Hermes to Raft as an external agent via a wake-channel bridge.
The adapter starts a loopback HTTP endpoint, spawns 'raft agent bridge' as a
child process, and injects content-free wake hints into the gateway session
pipeline. The agent reads/sends messages through the Raft CLI; the adapter
never touches message bodies or delivery cursors. Activity observer hooks
report tool/LLM/session lifecycle events via a bounded at-most-once queue.
Auto-enables when RAFT_PROFILE is set.
Cherry-picked from PR #47629. Authored by skyzh (@xxchan).
