Create a solution for updating page layout from a template

## Use case:

We often need to batch update the formatting and layout of our Markdown pages all at once.

**For example**:

Adding tags, inserting a photo, adding a new page section, creating new callout boxes and graphics, etc.

This needs to be automated so the page layout changes can easily be applied to hundreds of pages.

I'm guessing for now we can write a simply Python script and decide what to do from there.