feat!: update treesitter queries, highlights

[gsuuon]

This will break the current queries and may result in a lot of error messages. If you're using tree-sitter-note, you'll need to update it:

1. start nvim and run :TSUninstall note
2. close nvim
3. start nvim and load note (:Note or :Lazy load note.nvim)
4. :TSInstall note

The link format has changed from [<link>] to {{<link>}}. Use :NoteConvertLinksSquareToCurly in files with square bracket links to update them.

Tree-sitter node changes:

• section_children has been removed to be consistent with items (items just contain items, sections contain sections)
• decorators and links have been added
• item bodies can no longer start with any marker characters

Related grammar PR: gsuuon/tree-sitter-note#1