feat(syntax): support omit infographic/template keyword

[Aarebecca]

• [x] Support omit infographic / template:

list-row-horizontal-icon-arrow
data
  items
    - label Step 1
      desc Start
    - label Step 2
      desc In Progress

⚠️ The unregistered template will be ignored

Relative Issue: https://github.com/antvis/Infographic/issues/95