refactor: Override options redesign

* Add test for defaults, fix platform detection

* Improve correctness of reader.identifier with block

* Fix options test to be multiplatform

* 'Refactored by Sourcery'

docs: write a section on overrides

tests: test docker launches

feat: add identifiers to launches

test: add test for correct build step generation

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

unit_test/utils.py

@@ -0,0 +1,16 @@
+from cibuildwheel.options import CommandLineArguments
+
+
+def get_default_command_line_arguments() -> CommandLineArguments:
+    defaults = CommandLineArguments()
+
+    defaults.platform = "auto"
+    defaults.allow_empty = False
+    defaults.archs = None
+    defaults.config_file = None
+    defaults.output_dir = None
+    defaults.package_dir = "."
+    defaults.prerelease_pythons = False
+    defaults.print_build_identifiers = False
+
+    return defaults