build: attempt to fix build - #16

TL;DR

Improved CI workflow caching and updated registry fork reference.

What changed?

• Added disk cache and repository cache configurations to Bazel setup in CI and verify-hooks workflows
• Updated the registry fork reference in the publish workflow from myorg/bazel-central-registry to formatjs/bazel-central-registry
• Removed the test script from examples/aggregate/app/test.sh
• Removed the .npmrc file from examples/simple

How to test?

• Run the CI workflows to verify that the Bazel caching is working correctly
• Verify that the publish workflow correctly references the formatjs/bazel-central-registry fork
• Ensure that the examples still build and run correctly without the removed files

Why make this change?

• The Bazel caching improvements will speed up CI builds by reusing build artifacts between runs
• Updating the registry fork reference ensures that PRs are opened in the correct repository
• Removing unused test scripts and configuration files helps maintain a cleaner codebase