Generate commencement information for use on the front end

[goose-life]

It should look something like:

[
  {
    "eId": "chp_1__part_1__sec_1",
    "content": "section 1 was brought into force on 12 July 2021 by <a href='/akn/etc'>Name of commencing notice</a>. <em>Note: see section 12.</em>"
  },
  {
    "eId": "chp_1__part_1__sec_2",
    "content": "section 2 was brought into force on 1 July 2021."
  }
]