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/post_search_results.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+type PostSearchMatches map[string][]string
+
+type PostSearchResults struct {
+	*PostList
+	Matches PostSearchMatches `json:"matches"`
+}
+
+func MakePostSearchResults(posts *PostList, matches PostSearchMatches) *PostSearchResults {
+	return &PostSearchResults{
+		posts,
+		matches,
+	}
+}
+
+func (o *PostSearchResults) ToJSON() (string, error) {
+	copy := *o
+	copy.PostList.StripActionIntegrations()
+	b, err := json.Marshal(&copy)
+	return string(b), err
+}
+
+func (o *PostSearchResults) EncodeJSON(w io.Writer) error {
+	o.PostList.StripActionIntegrations()
+	return json.NewEncoder(w).Encode(o)
+}
+
+func (o *PostSearchResults) ForPlugin() *PostSearchResults {
+	copy := *o
+	copy.PostList = copy.PostList.ForPlugin()
+	return &copy
+}