Add help tags for useful paragraphs on text-obj behavior in object/visual mode

[bew]

Originally opened at neovim/neovim#25224

Is your feature request about something that is currently impossible or hard to do? Please describe the problem.

I just discovered (by really not understanding what was going on..) the builtin behavior of repeated usage of text objects in visual mode as described in:

vim/runtime/doc/motion.txt

Lines 701 to 709 in d8b86c9

	When used in Visual mode:
	When start and end of the Visual area are the same (just after typing "v"):
	One object is selected, the same as for using an operator.
	When start and end of the Visual area are not the same:
	For non-block objects the area is extended by one object or the white
	space up to the next object, or both for the "a" objects. The
	direction in which this happens depends on which side of the Visual
	area the cursor is. For the block objects the block is extended one
	level outwards.

This is very interesting behavior !!! 👌
However there is no way to simply refer to this paragraphs specifically.

other paragraph just above would also benefit from a help tag

vim/runtime/doc/motion.txt

Lines 686 to 699 in d8b86c9

	When used after an operator:
	For non-block objects:
	For the "a" commands: The operator applies to the object and the white
	space after the object. If there is no white space after the object
	or when the cursor was in the white space before the object, the white
	space before the object is included.
	For the "inner" commands: If the cursor was on the object, the
	operator applies to the object. If the cursor was on white space, the
	operator applies to the white space.
	For a block object:
	The operator applies to the block where the cursor is in, or the block
	on which the cursor is on one of the braces. For the "inner" commands
	the surrounding braces are excluded. For the "a" commands, the braces
	are included.

Describe the solution you'd like
I'd like to have the ability to refer to these 2 paragraphs specifically in my configs via 1+ help tags like v_text-objects or o_object-select

Describe alternatives you've considered
Refering to :h object-select or :h text-objects and mention it's about the paragraph(s) aaall the way below the list of builtin text objects...
But it's really not great for quick reference for such an important and potentially weird/unintuitive behavior..

[bew]

Thank you! 🤗