Previous/Next sibling actions should select nearest code block when code blocks

[aral]

Given:

1 const hello = 'hello'
2
3 console.log(hello)

If I’m on 1 and hit next sibling (Alt→), I get to 3.
If I’m on 2 and hit next sibling, I get nothing.
If I’m on 3 and hit previous sibling (Alt←), I get 1.
If I’m on 2 and hit previous sibling, I get nothing.

I understand why this is (because I’m between code blocks) but I feel it would help if this included special case logic to work as you would assume it does.

[the-mikedavis]

Actually in this case next and prev sibling do nothing because line 2 is on the root of the syntax tree (the program node which is the entire document) and the root has no siblings. You can check the subtree the primary cursor is on with :tree-sitter-subtree. It might be possible to descend into child nodes in the case where we recognize we're on the root but I think it would be confusing behavior since the next/prev-sibling commands generally climb the tree when no sibling nodes are detected.