feat(agentcompat): expose dashboard capability routes

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

cmd/dashboard/controller/terminal_fm_agentcompat_default.go

@@ -0,0 +1,18 @@
+//go:build !agentcompat
+
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+
+	"github.com/nezhahq/nezha/service/rpc"
+)
+
+func prepareAgentcompatCapabilityHeader(*gin.Context) {}
+
+func createIOStreamWithAgentcompatCapability(_ *gin.Context, streamID string, creatorUserID, serverID uint64, _ rpc.AgentCompatCapabilityPurpose) (func(), error) {
+	if err := rpc.NezhaHandlerSingleton.CreateStream(streamID, creatorUserID, serverID); err != nil {
+		return nil, err
+	}
+	return func() { _ = rpc.NezhaHandlerSingleton.CloseStream(streamID) }, nil
+}