Update readme with features and next steps

README.md

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 # ullekha
+
+
+A TUI for a notes app. Add notes , todos , random text anything directly on the terminal. Provide a filepath to be able to persist notes across terminal sessions. 
+The app provides a completely mouse-free , keyboard-only interface to add / edit / delete / highlight notes. The viewport is scrollable and can adjust automatically to resizing. 
+
+
+** Built using Haskell & Brick Library : https://hackage.haskell.org/package/brick-0.62 ** 
+
+
+## Features 
+
+- Add any number of notes 
+- Navigate the notes and delete selected notes 
+- Edit any note
+- Mark a note as important and it will be highlighted
+- Clone a note and then edit as required
+- Auto adjust layout upon resizing
+- Persistence through a text file. 
+- Paste into the note
+
+
+## To Be added 
+
+[ ] Add note groups 
+[ ] Allow persistence across devices 
+[ ] Allow user to override keyboard shortcuts 
+[ ] Multi-select and delete 
+[ ] Allow Checkboxes within the note
+[ ] Timed notes which expire 
+