[KE7]

Quoted command overrides such as ryzers run "python -c 'print(1 + 2)'" are split by the generated script's unquoted $1, causing errors such as the one reported while reviewing #105.

Parse the override once with shlex.split() and forward individual arguments with "$@". Existing generated scripts are adapted in memory when launched through Ryzers; their files and images are unchanged. Commands that need shell expansion explicitly invoke a container shell.

• Add CPU-only regression tests and CI for quoting, spaces, Unicode, empty arguments, literal wildcards/metacharacters, explicit shell pipelines, default commands, old scripts and error handling.
• Document command semantics and correct PyDrake's unsupported ryzers run -it bash example; interactive flags are already enabled by default.

Validation:

• All 212 documented examples across 64 files: 138 run examples checked through the actual CLI and both script formats with a Docker argument recorder; 74 build examples checked through the CLI parser.
• Tests pass on Python 3.8, 3.11 and 3.12. The argument regression matrix fails against the original runner.
• Four actual CPU Docker/CLI launches verify Python arguments and shell pipelines with both script formats. This validates launching, not every package's model execution.