Memo: copy & share templates

Copy and share notes with a single tap.
Recommended for saving canned messages such as emails.
Undo and Redo functions are included.

Tap operation can be changed from Settings (Share, Copy, Edit).
The default setting is Share.

Features
- Save text
- Tap a list to share to e-mail or copy to clipboard
- Change tap operation (Copy, Share, Edit)
- Undo and redo (Undo, Redo) functions
- Manage notes with label, search, and sort functions
- Customize (dark mode, theme colors)