Improve `org_meta_return` coherence on lists

Describe the bug

I feel that the current behaviour of org_meta_return on lists and checklists is really org_insert_heading_respect_content.

Steps to reproduce

So for example if we have the next file:

* Heading 1  <-- cursor here
  SCHEDULED: <2025-01-18>

If you press org_meta_return you get:

* Heading 1  
* <-- cursor here
  SCHEDULED: <2025-01-18>

If you press org_insert_heading_respect_content you get:

* Heading 1
  SCHEDULED: <2025-01-18>
  
* <-- cursor here

However if you have the next file:

* Heading 1
  - Line 1 <-- cursor here
    - Subline 1

If you press org_meta_return you get:

* Heading 1
  - Line 1
    - Subline 1
  - <-- cursor here

Which is closer to org_insert_heading_respect_content than org_meta_return as it respects the content

Expected behavior

From this file:

* Heading 1
  - Line 1 <-- cursor here
    - Subline 1

If you press org_meta_return you should get:

* Heading 1
  - Line 1
  -  <-- cursor here
    - Subline 1

If you press org_insert_heading_respect_content you get:

* Heading 1
  - Line 1
    - Subline 1
  - <-- cursor here

For me this change would be important because I use more often org_insert_heading_respect_content when dealing with headlines than org_meta_return so it would be a better ux experience for me to use the same key binding for what I'd expect on lists and checklists

Emacs functionality

No response

Minimal init.lua

local tmp_dir = vim.env.TMPDIR or vim.env.TMP or vim.env.TEMP or "/tmp"
local nvim_root = tmp_dir .. "/nvim_orgmode"
local lazy_root = nvim_root .. "/lazy"
local lazypath = lazy_root .. "/lazy.nvim"

for _, name in ipairs({ "config", "data", "state", "cache" }) do
	vim.env[("XDG_%s_HOME"):format(name:upper())] = nvim_root .. "/" .. name
end

-- Install lazy.nvim if not already installed
if not vim.loop.fs_stat(lazypath) then
	vim.fn.system({
		"git",
		"clone",
		"--filter=blob:none",
		"https://github.com/folke/lazy.nvim.git",
		"--branch=stable", -- latest stable release
		lazypath,
	})
end
vim.opt.rtp:prepend(lazypath)

require("lazy").setup({
	{
		"nvim-orgmode/orgmode",
		event = "VeryLazy",
		ft = { "org" },
		config = function()
			require("orgmode").setup({
				org_agenda_files = {
					"*.org",
				},
				mappings = {
					capture = {
						org_capture_finalize = "<c-s>",
					},
				},
			})
		end,
	},
}, {
	root = lazy_root,
	lockfile = nvim_root .. "/lazy.json",
	install = {
		missing = false,
	},
})

require("lazy").sync({
	wait = true,
	show = false,
})

Screenshots and recordings

No response

OS / Distro

linux

Neovim version/commit

0.10.0

Additional context

(Sorry for the issue spam, I usually gather them and once in a while open them all together)

Start by locating the org_meta_return and org_insert_heading_respect_content entry points, then reproduce the list and checklist examples from the issue using the provided minimal init.lua. Compare their behavior around nested list content; done means org_meta_return leaves the nested subline with the original item while creating the new sibling item as shown in the expected output.