feat(files): Add Variated Nylium Pack

[PAPISOP]

1. Added Variated Nylium Pack
2. Added brighter_variated_nether_nylium combination

Resolves #324

By checking the following boxes with an X, you ensure that:

• [X] The pack was tested ingame in at least one device.

• [X] The pack is an existing BT pack, is a missing pack from VT or is an accepted pack/change in a discussion.

• [X] The pack code follows the style guide.

• [X] The commits follow the contribution guidelines.

• [X] The PR follows the contribution guidelines.

• [X] (Optional) Tested in Windows

• [ ] (Optional) Tested in Android

• [ ] (Optional) Tested in iOS

• [ ] (Optional) Tested in any console

• [ ] (Optional) Tested in BDS

[PAPISOP]

Variated Nylium is not required in Bedrock as they are already variated in Bedrock