feat(leveva): OKICK — operator force-kick bypassing chanop status (P11 slice 294)
charybdis extensions/m_okick.c: an operator force-kicks a member without being
a chanop (or even a member of the channel), sourced from the server so the
channel sees a normal KICK. The oper-override sibling of KICK (chanop-gated) and
REMOVE (chanop force-part), completing the operator channel-intervention family.
- New atomic seam Channels::okick: no permission/rank check (the override); the
one refusal is +Y official-join, whose immunity leveva keeps absolute.
- command/okick.rs gate ladder 481/461/401/403/441/482; server-sourced KICK
echoed to the oper + fanned to local members; relayed via new
s2s::relay::server_kick; +s audit snomask.
- Help page + COMMANDS allowlist + index.md operator line.
- 4 channel units + 5 command units + okick_proptest (2 props) + golden_okick.
leveva-native (no oracle); plain oper-bit gate; +Y respected (vs charybdis raw
removal); oper always gets the echo even off-channel; local-only.