Adding typescript to the project

[linspw]

Hello everything is fine?

I would like to thank you for the library, it is fantastic!

My suggestion with this PR is to contribute to improving the typing in the project

I thank the attention

This closes: https://github.com/mauricius/vue-draggable-resizable/issues/294

OBS: [X] All tests passed [X] Build process working fine [X] Exporting types

Type autocomplete

[linspw]

Do you think @mauricius that PR makes sense?