add vdir sync feature

README.md

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+# LŪK
+
+> Pronunced Look...
+
+A collection of tools for syncing microsoft Mail and Calendars with local file-system based PIM standards like Maildir, VDIR, etc so you can use local TUI and CLI tools to read write and manage your mail and events.
+
+## Features
+
+- Download Emails to a local maildir
+- Download Events to a local VDIR
+- two-way sync of locally changed files
+- View OneDrive Folders and Files in your terminal
+- a couple different ways to view email messages locally, but you should probably be using [aerc]