Interpret template from Markdown file

[hawkeyexl]

We should be able to take a Markdown file as input and interpret the structure into a template that can then be applied to other files.

• The template should be able to have comments immediately following a heading that then apply to the whole section.
• Short-term, this would act as a substitute for having a templates.yaml file.
• Long-term, may be able to use this as a way of creating or adding to a templates.yaml file.