fix: fixes for go ga

[didroe]

Description

Makes the following fixes/improvements for Go GA:

• Guess package names for versioned imports. eg. github.com/bearer/foo/v2 guesses foo as the package name
• Strip go- prefix and -go suffix from package names
• Allow rule patterns consisting of a single identifier to match package identifiers
• Lookup operand for index operations

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format