UI: Book title page: Continue button
Context
Once the user has 1) clicked 'Continue' from the Import page or 2) Clicked 'Start writing your book' from the dashboard, they are taken to a Book title page. On this page we need a 'Continue' button so the user can move on to the editor.
The Continue button should only be clickable when a title has been added. If no title has been added it should be grey and not clickable.
Design
Add the 'Continue' button to the Book title page below the explanatory text, as in the Figma design here and shown below:
The button should use the same 'Continue' component as https://gitlab.coko.foundation/ketida/lulu/-/issues/15
Implementation (if applicable)
[A description of the steps to implement the feature.]
Alternative approaches (if applicable)
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Open issues (if applicable)
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