Includes mmctl into the mono-repo (#23091)

* Includes mmctl into the mono-repo

* Update to use the new public module paths

* Adds docs check to the mmctl CI

* Fix public utils import path

* Tidy up modules

* Fix linter

* Update CI tasks to use the new file structure

* Update CI references

server/cmd/mmctl/printer/util.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package printer
+
+import (
+	"bytes"
+	"errors"
+	"os"
+
+	"golang.org/x/term"
+)
+
+func checkInteractiveTerminal() error {
+	fileInfo, err := os.Stdout.Stat()
+	if err != nil {
+		return err
+	}
+
+	if (fileInfo.Mode() & os.ModeCharDevice) == 0 {
+		return errors.New("this is not an interactive shell")
+	}
+
+	return nil
+}
+
+func termHeight(file *os.File) (int, error) {
+	_, h, err := term.GetSize(int(file.Fd()))
+	if err != nil {
+		return -1, err
+	}
+
+	return h, nil
+}
+
+func lineCount(b []byte) int {
+	return bytes.Count(b, []byte{'\n'})
+}