feat/display-open-library-books (#1)

* wip: feat: display book covers from open library

* wip: feat: get book description

* wip: refactor: rename to book-tok

* docs: update ReadMe

* fix: fix build errors

* feat: use gradient background based on colours in the book cover image

* fix: move the cover image

move the cover image so that it is not obscured by the info panel

* fix: remove irrelevant icons

* fix: update about info

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Co-authored-by: Ben Smith <ben.smith@abcam.com>