feat: allow aggregate to output to specific file

[longlho]

Add transitive dependency support to formatjs_aggregate

TL;DR

Added support for transitive message aggregation and improved documentation for cross-platform compatibility.

What changed?

• Added a new out attribute to formatjs_aggregate rule to specify custom output file names
• Created a new transitive_messages example that demonstrates proper traversal of the dependency graph
• Added comprehensive documentation about platform support (macOS, Linux, Windows)
• Improved documentation with details about cross-platform builds, output groups, and usage patterns
• Added a fixture file to verify transitive dependency resolution works correctly

How to test?

1. Build the new transitive messages example:

   bazel build //examples/aggregate/app:transitive_messages

2. Verify that messages from module1 are included even though it's only a transitive dependency:

   bazel test //examples/aggregate/app:aggregation_test

3. Test on different platforms to verify consistent output across macOS, Linux, and Windows

Why make this change?

This change ensures that the formatjs_aggregate rule properly handles transitive dependencies, which is crucial for large monorepos where message dependencies might be nested several levels deep. The improved documentation makes it clear that the rules work across all major platforms without special configuration, which helps users understand the cross-platform capabilities of the toolchain.

[longlho]

• feat: allow custom formatjs_cli toolchain #24
• fix: remove rules_shell dep #23
• feat: allow aggregate to output to specific file #22 👈 (View in Graphite)
• main

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[longlho]

Merge activity

• Jan 6, 3:00 PM UTC: @longlho merged this pull request with Graphite.