Live highlight/select source buffer while navigating outline, like `:Inspect`

[hedyhli]

Treesitter syntax tree buffer can keep a highlight on the corresponding range whenever cursor moves to a node in the buffer.

Ideas:

• Use the existing jump highlight but clear highlight when cursor moves the next time
  • This could either be highlighting the node.line or the entire range (like treesitter)
• Keymap to set visual selection on node range for selected node

[hedyhli]

Actually we already have auto_jump and keybinds