Get definition on sequence item

When using a yaml sequence, there seems to be no way to hover the definition of a sequence item:

some_sequence:
  - mysequence_item_key: value # There is no position I can hover from that will give definition of the whole node in sequence
    second_key: value2

other_sequence:
  - { # If I hover on the brace, I do get the definition of the node in the sequence.
       mysequence_item_key: value,
       second_key: value
    }

Describe the solution you would like

Support hovering definition of the sequence item on the - char

some_sequence:
  >>-<< mysequence_item_key: value # Hover on the - to get definition of sequence item
    second_key: value2

Currently this provides no information, and it seems like the most logical place to hover.

Describe alternatives you have considered

Write all sequences items with explicit curly braces, but now all key/value pairs must be delineated with commas, and all sequences and mappings in the sequence item also require explicit braces and brackets.

sequence:
  - {
       key: [sequence, must, have, square, bracket],
       between_keys: {must: [have, commas, and, braces]}
    }

The issue names no source files, tests, or entry points. Locate the language server's hover and definition handling for block sequence nodes, then add coverage for hovering the '-' marker; done means the sequence item's definition is shown there without requiring flow-style braces.