Create improved book toggling component

[Nateowami]

This is a proposed component for toggling a book when selecting books (an alternative to mat chips).

I'm opening it as a draft PR so Storybook will get published to Chromatic.

I'm proposing a design, and I think this branch can serve as a basis if others want to propose a different design, by using this as a starting point.

For option A (what this PR originally had), see this storybook:
https://644bffe327c540a62f0fd260-wvwluxllwf.chromatic.com/?path=/story/translate-togglebook--selected

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[codecov]

Codecov Report

Attention: Patch coverage is 24.24242% with 25 lines in your changes missing coverage. Please review.

Project coverage is 78.28%. Comparing base (7e91fbc) to head (1a80a2f).
Report is 2 commits behind head on master.

Files	Patch %	Lines
...ft-generation/toggle-book/toggle-book.component.ts	24.24%	25 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2680      +/-   ##
==========================================
- Coverage   78.34%   78.28%   -0.06%     
==========================================
  Files         521      522       +1     
  Lines       30154    30187      +33     
  Branches     4930     4926       -4     
==========================================
+ Hits        23625    23633       +8     
- Misses       5755     5792      +37     
+ Partials      774      762      -12     

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[Nateowami]

See feature/book-toggle-no-border for another option:

EDIT: I've pushed that option to this PR.

[kylebuss]

My vote would be the book toggle with no border. I really like the info display of book completion percentage when hovering over the book!