feat: add glob matching configuration

[spiffcs]

Summary

Grant can now be configured using glob syntax to match on deny or allow policy rule sets

deny: *
allow:
  - MIT
  - Apache-*

In the above case all licenses are denied. MIT is then allowed along with all permutations of Apache-*. This would include:

Apache-1.0
Apache License 1.1
Apache License 2.0

Report Generator

Also included is a refactor/roadmap for multiple source configuration. Grant as a library has been updated to generate a Report which contains a Result for each provided source. Library users can use:

report := NewReport(format, policy, srcs...)

This allows a custom policy to be provided/configured for multiple sources.

To run the policy against each source users can execute:

report.Run()

Because Run returns the populated report users can then call Render(io.Writer) to write the results. The format is considered at the time of construction, but the format can be changed after the fact.

report.Run().Render(io.Writer)