Add a create flow

[r1fad]

This flow would allow a user to create what we would call a 'Notebook' with the following components:

• Notes
  • This would allow a user to type up their notes. This could be a rich text editor
• Flash cards
  • This would allow a user to create question-answer type flash cards

[achadha0111]

Rich text editor component

Need to explore whether it makes sense to do this as a full draft.js type rich text editor or a GitHub based one where the buttons map to equivalent markdown.

Create flash cards component

To keep things simple, flashcards are of the simplest form at the moment - text question and answers.

Implementation can be handled using a new cell type encapsulating a React Form. This cell type is added using a button in the toolbar.

[achadha0111]

Made some progress on this.

Progress Made:

1. Setup template UI
2. Bare minimum UI elements for navigation between relevant sections.
3. Interactive icons for adding rich notes elements (text, code, flashcard).

Tasks Pending:

1. Setup UI tests.
2. Figure out how to make nteract work in a custom application.