extra directories created when installing packages

[vegastyle]

When you use openpackage install, if openpackage detects a platform directory, it will create empty directories for all the configurations it supports even if the package being installed does not have any files for it. By default openpackage should not create directories for files that do not exist in the package.

Steps to recreate issue:

mkdir .claude
mkdir .opencode
openpackge init empty-package 
openpackage add some-file.md
# Set version manually of the generated package.yml
openpackage pack empty-package
openpackage install empty-package

.claude and .opencode should now have agents, commands directories created even though the package does not have any. The claude code directory should also have rules and skill files as well.

[hyericlee]

Issue found, will be fixed in next release.
Thanks for catching this!