rubocops/resource_requires_dependencies: add bcrypt

[p-linnane]

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Claude Code was used to locate the existing ResourceRequiresDependencies cop, add the bcrypt entry and corresponding specs, and run brew lgtm locally. I reviewed the diff and verified the specs match the pattern used by the existing lxml/pynacl/pyyaml checks.

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Flags Python formulae that include the bcrypt resource but don't declare the pkgconf and rust build dependencies it needs to build from source. Follow-up to the standardization in Homebrew/homebrew-core#278702.

[Copilot]

Pull request overview

Adds bcrypt to the FormulaAudit/ResourceRequiresDependencies RuboCop cop so Python formulae using the bcrypt resource are audited for required dependencies.

Changes:

• Extend the cop to recognize the bcrypt resource and require pkgconf + rust.
• Add spec coverage for formulas with/without bcrypt, and with missing dependencies.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
Library/Homebrew/rubocops/resource_requires_dependencies.rb	Adds bcrypt handling and required dependency list for the audit cop.
Library/Homebrew/test/rubocops/resource_requires_dependencies_spec.rb	Adds tests covering bcrypt resource scenarios.

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[MikeMcQuaid]

Thanks!