[ACA-20] Add/Remove favorite library

[pionnegru]

PR Checklist

Please check if your PR fulfills the following requirements:

- [ ] The commit message follows our guidelines: https://github.com/Alfresco/alfresco-content-app/blob/master/CONTRIBUTING.md#commit
- [ ] Tests for the changes have been added (for bug fixes / features)
- [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application / Infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[codecov-io]

Codecov Report

Merging #804 into development will increase coverage by 0.37%.
The diff coverage is 86.53%.

@@               Coverage Diff               @@
##           development     #804      +/-   ##
===============================================
+ Coverage        61.16%   61.54%   +0.37%     
===============================================
  Files              111      113       +2     
  Lines             3749     3799      +50     
  Branches           616      620       +4     
===============================================
+ Hits              2293     2338      +45     
- Misses            1348     1352       +4     
- Partials           108      109       +1

Impacted Files	Coverage Δ
src/app/extensions/core.extensions.module.ts	80% <ø> (ø)	⬆️
...favorite-libraries/favorite-libraries.component.ts	75% <0%> (-3.27%)	⬇️
...rc/app/components/libraries/libraries.component.ts	50% <0%> (ø)	⬆️
...orite-library/toggle-favorite-library.component.ts	100% <100%> (ø)
src/app/services/content-management.service.ts	67.99% <100%> (+0.07%)	⬆️
src/app/directives/library-favorite.directive.ts	90% <90%> (ø)

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