Translating README.md in Italian for wider accessibility

[nourbenamor2001]

Clear and concise description of the problem

In order to make the react-big-calendar project more accessible to a wider audience of developers, there is a need to translate helpful ressources associated with the library.

Suggested solution

I would like to translate the README.md in Italian.

Alternative

No response

Additional context

No response

Validations

• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

Would you like to open a PR for this feature?

• I'm willing to open a PR