Add Bazel extension to expose transitive dependencies via setup.bzl

[Copilot]

This PR adds a Bazel module extension that allows downstream consumers to access transitive dependencies without explicitly declaring them in their MODULE.bazel files, following best practices for reusable Bazel modules.

Problem

Currently, downstream projects using score_docs_as_code must manually declare:

bazel_dep(name = "score_python_basics")

in their MODULE.bazel, even though it's only used indirectly by macros from this module. This violates the principle of encapsulated, reusable modules and puts an unnecessary burden on consumers.

Solution

Added a setup.bzl module extension that exposes transitive dependencies:

New Files:

• setup/setup.bzl - Module extension implementation
• setup/BUILD - Build file for the setup directory
• examples/test-extension/ - Example demonstrating usage
• VERIFICATION.md - Testing and verification steps

Usage Pattern:

Before (required manual dependency declaration):

bazel_dep(name = "score_docs_as_code", version = "...")
bazel_dep(name = "score_python_basics")  # Required manually

After (automatic via extension):

bazel_dep(name = "score_docs_as_code", version = "...")

use_extension("@score_docs_as_code//setup:setup.bzl", "setup")
use_repo(setup, "score_python_basics")

Benefits

• Encapsulation: Downstream consumers don't need to know about internal dependencies
• Simplicity: Reduced boilerplate in downstream MODULE.bazel files
• Best Practices: Follows Bazel's recommended patterns for reusable modules
• Backward Compatibility: Existing usage patterns continue to work

Documentation

Updated documentation in:

• README.md - Main usage documentation
• examples/README.md - Extended examples with setup extension usage
• Added comprehensive example in examples/test-extension/

The solution allows downstream projects to use the docs() macro and utilities like score_py_pytest and score_virtualenv without manually declaring transitive dependencies.

Fixes #109.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• releases.bazel.build
  • Triggering command: /usr/local/lib/node_modules/@bazel/bazelisk/bazelisk-linux_amd64 test //src/extensions/score_source_code_linker:score_source_code_linker_test (dns block)
  • Triggering command: ./bazelisk version (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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