Add a New Theme

1. Create a YAML file in src/rendercv/schema/models/design/other_themes/

   touch src/rendercv/schema/models/design/other_themes/mytheme.yaml
   

2. Add the schema reference and override Classic theme defaults

   # yaml-language-server: $schema=../../../../../../schema.json
   design:
     theme: mytheme
     # Override any defaults from classic_theme.py here
     colors:
       name: rgb(0,0,0)
     typography:
       font_family: New Computer Modern
     # ... add any other overrides
   

3. Done. Use it:

   rendercv new "John Doe" --theme mytheme