create stencil for adhesive layers

[wannessels]

• added --type option for adhesive, defaults to solderpaste
• changed zipping gerbers from subprocess.check_call("zip") to shutil.make_archive()
• fixed --cutout (layer names did not match)

[wannessels]

I've made some changes:

• replaced enum with dataclass & constants
• reverted formatting change for click options help
• added typing to all changed methods
• set stencil_type default to SolderPaste, wherever the parameter was added, for backwards compatibility