chore: update to Angular 15

[Yberion]

Hello,

This PR does:

• Update to latest Angular 14 packages
• Update all packages to latest version except:
  • typescript
  • @types/node
• Update the lib to only support Angular ^15
• Update the app to Angular 15
  • browserlistrc was removed
  • environment files have been deleted
  • angular.json was update to reflect that
• Explicit tslib version in the lib
• I removed angular-google-tag-manager from the installed packages, it now use the one built locally
  • It prevented from updating to Angular 15 (I don't like --force)
  • The lib should be built before launching the demo app
  • I added a paths entry in the tsconfig.json file
• Only update patch packages version
• I reworked the project structure to only have one package.json
  • The demo-app is now in the folder projects
  • angular.json has been updated
  • This allowed to use the locally built lib on the demo-app (else there was a problem with Angular 15)

Feel free to also remove other PR/branche related to packages update for cleaning purpose.

If everything is ok, I can make a new commit to bump the version. Could you release a new version following this PR? (This would be much appreciated heh)

Have a good day.

@mzuccaroli

[mzuccaroli]

great job , I'll test the pr ASAP

[mzuccaroli]

I merged your PR, added you to the contributor list, updated the version and published the new 1.7.0 package to npm thank you for your awesome contribution!

[Yberion]

Awesome, thank you!