Add drawing rectangles, text and templates to schematic config

[Jetsama]

Allow for another section in schematic config files called drawing. This can pull from separate config file or describe what to draw. An example is as below:

drawing: 
   -template: template.yml
    elements:
     - shape: outline
       px: 5
       region: 1

     - shape: rect
       px: 5,
       x: 5
       y: 5
       height: 100
       width: 100

     - shape: text
       px: 5,
       x: 50
       y: 50
       text: {DUT}_testbench

Updates will add ability to scale sections with respect to regions.