CLI: Add development mode support

Hide development specific options and don't require dev modules unless
`user.developer` is set to `True`.

lib/python/qmk/cli/hello.py

@@ -6,7 +6,7 @@ from milc import cli
 
 
 @cli.argument('-n', '--name', default='World', help='Name to greet.')
-@cli.subcommand('QMK Hello World.')
+@cli.subcommand('QMK Hello World.', hidden=False if cli.config.user.developer else True)
 def hello(cli):
     """Log a friendly greeting.
     """

lib/python/qmk/cli/pyformat.py

@@ -5,7 +5,7 @@ from milc import cli
 import subprocess
 
 
-@cli.subcommand("Format python code according to QMK's style.")
+@cli.subcommand("Format python code according to QMK's style.", hidden=False if cli.config.user.developer else True)
 def pyformat(cli):
     """Format python code according to QMK's style.
     """

lib/python/qmk/cli/pytest.py

@@ -7,7 +7,7 @@ import subprocess
 from milc import cli
 
 
-@cli.subcommand('QMK Python Unit Tests')
+@cli.subcommand('QMK Python Unit Tests', hidden=False if cli.config.user.developer else True)
 def pytest(cli):
     """Run several linting/testing commands.
     """