doc: documentation update for core.qol.todo_items and lazy.nvim

[VigneshR387]

Changes

• Add tree-sitter-norg as dedpendency for lazy.nvim installation
• Add missing default keybinding for todo state "ambiguous"
• fix typo <Plug>(neorg.qol.todo-items.todo.task-on_hold) to <Plug>(neorg.qol.todo-items.todo.task-on-hold)

[benlubas]

The parser is a dependency in the rock spec. You don't need it here

You can reopen with just the keybind change.

[VigneshR387]

I have submitted a PR #1811 for the keybinding changes. As for the parser, as mentioned in the #1808, Neorg fails to load the parser even though its installed through luarocks, most probably a loader order issue. To work around this, I had to explicitly declare the treesitter plugins as dependencies so lazy.nvim loads them before Neorg:

  dependencies = {
    'nvim-neorg/tree-sitter-norg',
    'nvim-neorg/tree-sitter-norg-meta',
  },