Highlight the blocks that adjacent to air (and liquid) when enabling X-Ray

[TanChenyu]

Pre-suggestion checklist

• I have searched existing issues and didn't find any previous issues with the same suggestion.
• This is only one suggestion. I understand that GitHub issues don't work well with lists.
• This feature doesn't already exist in the latest version of Wurst. I've made sure my installation is up to date.
• I have looked at the code and am reasonably confident that this suggestion is possible to implement.

What type of improvement are you suggesting?

Changing the settings of existing features.

What type of player would find this improvement useful?

Miners

Description

Just like the title said. Add a frame of blocks that that adjacent to air and liquid when enabling X-Ray.
(I think CaveFinder can be delete if this feature added)