feat(agentcompat): add scoped IO stream capabilities

Co-authored-by: naiba/CloudCode <hi+cloudcode@nai.ba>

service/rpc/io_stream_capability_publication_default.go

@@ -0,0 +1,9 @@
+//go:build !agentcompat
+
+package rpc
+
+import "time"
+
+func (*NezhaHandler) StartAgentCompatNATStream(AgentCompatNATPublishHandle, time.Duration) (bool, error) {
+	return false, ErrAgentCompatCapabilityUnavailable
+}