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/plugin/checker/internal/version/version_test.go

@@ -0,0 +1,58 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package version
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestVersionComparison(t *testing.T) {
+	testCases := []struct {
+		a, b V
+	}{
+		{
+			a: V("1.2"),
+			b: V("1.10"),
+		},
+		{
+			a: V("1.2.1"),
+			b: V("1.2.3"),
+		},
+		{
+			a: V("1.2"),
+			b: V("1.2.3"),
+		},
+		{
+			a: V("1.2.1"),
+			b: V("1.2.3"),
+		},
+		{
+			a: V("1.1"),
+			b: V("1.2.3"),
+		},
+		{
+			a: V("1.2.3"),
+			b: V("1.3"),
+		},
+		{
+			a: V("1.2.1-rc2"),
+			b: V("1.2.1-rc10"),
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("%+v", tc), func(t *testing.T) {
+			assert.True(t, tc.a.LessThan(tc.b))
+			assert.False(t, tc.b.LessThan(tc.a))
+
+			assert.True(t, tc.b.GreaterThanOrEqualTo(tc.a))
+			assert.False(t, tc.a.GreaterThanOrEqualTo(tc.b))
+		})
+	}
+
+	assert.True(t, V("1.2").GreaterThanOrEqualTo("1.2"))
+}