perf(directive): as standalone

[rbalet]

Change the project to work with standalone: true component.

Impact

• The would then only works with from angular v16
• Reduce the amount of code needed
• Lower the bundle size of the library
• Works in the newest angular way
• Let us import only digit-only, without the mask and vice versa (overall optimisation)

[rbalet]

@changhuixu Hi there.

Could this being merged ?

If you aren't working on this library anymore, I'll be happy to help maintain it.

Cheers