Add tmux-toggle-scratch (#148)

Author: momo-lab

README.md

@@ -183,6 +183,7 @@ List of helpful tmux links for various tutorials, plugins, and configuration set
 - [tmux-tilish](https://github.com/jabirali/tmux-tilish) Turn tmux into a dynamic window manager with intuitive keybindings (inspired by i3wm/sway)
 - [tmux-tilit](https://github.com/2KAbhishek/tmux-tilit) Brings tiling window manager features and intuitive keybindings to your tmux workflow.
 - [tmux-timetrap](https://github.com/croxarens/tmux-timetrap) Keep your time tracked directly with TMUX (The plugin is just a wrapper for [timetrap](https://github.com/samg/timetrap))
+- [tmux-toggle-scratch](https://github.com/momo-lab/tmux-toggle-scratch) Toggle scratch popup sessions for quick note-taking and temporary work.
 - [tmux-wormhole](https://github.com/gcla/tmux-wormhole) Use tmux to download files with magic wormhole
 - [tmux-pianobar](https://github.com/GoHarder/tmux-pianobar) A menu and status bar widget for Pianobar
 - [tmux-plugins](https://github.com/tmux-plugins) Official tmux plugins