Expose public/ API as submodule (#23345)

* model -> public/model

* plugin -> public/plugin

* public/model/utils -> public/utils

* platform/shared/mlog -> public/shared/mlog

* platform/shared/i18n -> public/shared/i18n

* platform/shared/markdown -> public/shared/markdown

* platform/services/timezones -> public/shared/timezones

* channels/einterfaces -> einterfaces

* expose public/ submodule

* go mod tidy

* .github: cache-dependency-path, setup-go-work

* modules-tidy for public/ too

* remove old gomodtidy

server/einterfaces/cluster.go

@@ -0,0 +1,32 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package einterfaces
+
+import (
+	"github.com/mattermost/mattermost-server/server/public/model"
+)
+
+type ClusterMessageHandler func(msg *model.ClusterMessage)
+
+type ClusterInterface interface {
+	StartInterNodeCommunication()
+	StopInterNodeCommunication()
+	RegisterClusterMessageHandler(event model.ClusterEvent, crm ClusterMessageHandler)
+	GetClusterId() string
+	IsLeader() bool
+	// HealthScore returns a number which is indicative of how well an instance is meeting
+	// the soft real-time requirements of the protocol. Lower numbers are better,
+	// and zero means "totally healthy".
+	HealthScore() int
+	GetMyClusterInfo() *model.ClusterInfo
+	GetClusterInfos() []*model.ClusterInfo
+	SendClusterMessage(msg *model.ClusterMessage)
+	SendClusterMessageToNode(nodeID string, msg *model.ClusterMessage) error
+	NotifyMsg(buf []byte)
+	GetClusterStats() ([]*model.ClusterStats, *model.AppError)
+	GetLogs(page, perPage int) ([]string, *model.AppError)
+	QueryLogs(page, perPage int) (map[string][]string, *model.AppError)
+	GetPluginStatuses() (model.PluginStatuses, *model.AppError)
+	ConfigChanged(previousConfig *model.Config, newConfig *model.Config, sendToOtherServer bool) *model.AppError
+}