feat(sandbox): create the sandox-angular-lib project (ARCH-285)

[tschaffter]

Closes https://sagebionetworks.jira.com/browse/ARCH-285

Changelog

• Add the sandbox-angular-lib project
• Import the single component from the lib into sandbox-angular-app

References

• https://nx.dev/nx-api/angular/generators/library
• feat(sandbox): create an Angular app using the new default bundler (ARCH-281)  #2843

Preview

Create the library

nx g @nx/angular:library sandbox-angular-lib \
  --directory libs/sandbox/angular-lib \
  --prefix sandbox \
  --projectNameAndRootFormat as-provided \
  --dry-run

Then, I prefixed the key for this project with @sagebionetworks/ in tsconfig.base.json located in the root folder. This enables to import the library as @sagebionetworks/sandbox-angular-lib.

Serve the app

nx serve sandbox-angular-app