fix(mixins-preview): strongly-typed ConstructSelector interface

[mrgrain]

Reason for this change

The ConstructSelector API in mixins-preview was too restrictive, only accepting specific selector types rather than allowing custom implementations. Additionally, byId() used regex patterns which are less intuitive than glob patterns for path matching.

Description of changes

This PR introduces a strongly-typed IConstructSelector interface and improves selector functionality:

Breaking Changes:

• Mixins.of() now accepts IConstructSelector instead of the concrete ConstructSelector class, enabling custom selector implementations
• ConstructSelector.byId() now uses glob patterns instead of regular expressions for more intuitive matching
• ConstructSelector.resourcesOfType() now requires string CloudFormation resource type names instead of accepting class references

New Features:

• Added IConstructSelector interface for custom selector implementations
• Added ConstructSelector.byPath() to match on construct paths using glob patterns
• Added minimatch dependency for glob pattern matching

Examples:

// Custom selector implementation now possible
class MySelector implements IConstructSelector {
  select(scope: IConstruct): IConstruct[] { /* ... */ }
}

// Glob patterns instead of regex
ConstructSelector.byId('*prod*')  // instead of /prod-.*/
ConstructSelector.byPath('*/Prefix/**')

// String resource types
ConstructSelector.resourcesOfType(s3.CfnBucket.CFN_RESOURCE_TYPE_NAME)

Describe any new or updated permissions being added

No new or updated IAM permissions are needed.

Description of how you validated changes

• Added test for byPath() selector
• Updated existing tests to use new glob pattern syntax
• Updated README examples to reflect new API
• All tests pass

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

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