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/public/model/push_notification_test.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPushNotificationDeviceId(t *testing.T) {
+
+	msg := PushNotification{Platform: "test"}
+
+	msg.SetDeviceIdAndPlatform("android:12345")
+	require.Equal(t, msg.Platform, "android", msg.Platform)
+	require.Equal(t, msg.DeviceId, "12345", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+
+	msg.SetDeviceIdAndPlatform("android:12:345")
+	require.Equal(t, msg.Platform, "android", msg.Platform)
+	require.Equal(t, msg.DeviceId, "12:345", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+
+	msg.SetDeviceIdAndPlatform("android::12345")
+	require.Equal(t, msg.Platform, "android", msg.Platform)
+	require.Equal(t, msg.DeviceId, ":12345", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+
+	msg.SetDeviceIdAndPlatform(":12345")
+	require.Equal(t, msg.Platform, "", msg.Platform)
+	require.Equal(t, msg.DeviceId, "12345", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+
+	msg.SetDeviceIdAndPlatform("android:")
+	require.Equal(t, msg.Platform, "android", msg.Platform)
+	require.Equal(t, msg.DeviceId, "", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+
+	msg.SetDeviceIdAndPlatform("")
+	require.Equal(t, msg.Platform, "", msg.Platform)
+	require.Equal(t, msg.DeviceId, "", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+
+	msg.SetDeviceIdAndPlatform(":")
+	require.Equal(t, msg.Platform, "", msg.Platform)
+	require.Equal(t, msg.DeviceId, "", msg.DeviceId)
+	msg.Platform = ""
+	msg.DeviceId = ""
+}