CAN should contain a customised instance of the remark markdown serialiser

CAN uses remark to render markdown both for display and for export.

Each output should build its own customised instance of remark, configured to render correctly depending on requirements. Customisation of remark's renderer will be done using its built-in extension mechanism

This lets each medium set its own method of rendering and lays groundwork for other output methods.

Backlinks

• CAN manager links should be rendered as blue text
  • CAN should contain a customised instance of the remark markdown serialiser, which in this case will replace the link node to output the link name in a colour.
• CAN's show command should render a note
  • CAN's show command is used to display notes. When passing a valid note name as an argument, CAN should render that note in full using the cli markdown variant.