Support for treesit-beginning-of-defun and friends and which-function-mode

[VlachJosef]

Hello,

This PR defines treesit-defun-type-regexp.

Having this regex allow use of treesit-beginning-of-defun and treesit-end-of-defun commands.

There is an issue with treesit-beginning-of-defun in cases when body of a scala function etc. is an indented_block. For example:

  def parseInt: Int =
    input => parse(input)

With out of the box functionality point jumps to the parent of parseInt function.

To fix this issue scala-ts--move-out-of-indented-block advice is run before treesit-beginning-of-defun is executed.

Introducing treesit-defun-type-regexp also make which-function-mode to work correctly.

[KaranAhlawat]

Let's try and discuss these comments! Thank you very much for your contribution.

[KaranAhlawat]

@VlachJosef Thank you again for your contribution. I hope the package has helped you out! :) Will be merging and closing this now.