Enhance default_package_path to serve multi package projects better

[attilah]

Feature Type

I'm interested in functionality that solves a current problem or limitation in how CumulusCI works.

Does your feature request solve a current problem?

Cumulus CI does not support SFDX projects containing multiple packages. By enhancing default_package_path function to make it smarter it could create 2GP without configuration changes.

Describe the solution you'd like

Change default_package_path function to first lookup the name of the package within packageDirectories and if not found an exact match then:

• if there are multiple package directories AND the current package's name does not match the project name print a warning (as perhaps there is a typo or such thing), then fallback to default
• if there are no multiple package directories configured, just keep the existing behavior and fallback to default
• edge case that is not handled Today in case of misconfiguration, if there is no default and no force-app directory exists which is treated as default value, then it should probably hard fail as outcome is definitely not something anyone wants.

Describe alternatives you've considered

N/A

Additional context

No response