Add Virgin Islands (British) public holidays

[XSpielinbox]

🎁 Adds support for the Virgin Islands (British)

However, it is missing translations at the moment, as I did not know how to translate them.

[derTobsch]

Hey @XSpielinbox,

thanks for this pull request and all the other issues. I just went through them all and will give feedback in September. If you want to provide further pull requests of the other issues I would be more than happy.

[XSpielinbox]

Hey, @derTobsch ,
I would be more than happy to help with remediation of the other issues, but would need some additional guidance on how to implement it.

I also would be working on adding support for some other countries in the next days. How long do you expect to have this PR open? I would like to base my work on this PR, to avoid merge-conflicts in jollyday-core/src/main/resources/descriptions/holiday_descriptions.properties.

[derTobsch]

Hey, @derTobsch , I would be more than happy to help with remediation of the other issues, but would need some additional guidance on how to implement it.

I also would be working on adding support for some other countries in the next days. How long do you expect to have this PR open? I would like to base my work on this PR, to avoid merge-conflicts in jollyday-core/src/main/resources/descriptions/holiday_descriptions.properties.

Use this branch as your base branch for the other pull requests and so on, because I won't be around for the next two weeks. But in September I will have enough time to release a great version with this enhancements and bug fixes.

[XSpielinbox]

Thank you for merging my first merge requests!