feat: Package/windows

[markphelps]

Re: #141 (comment)

This pull request introduces several changes to the build and packaging workflows, as well as updates to support Windows in various SDKs. The most important changes include adding support for Windows builds, modifying the workflows to handle different platforms, and updating the SDKs to accommodate these changes.

Workflow Updates:

• Added support for triggering workflows on pull requests to the main branch in .github/workflows/package-ffi-engine.yml.
• Replaced iOS and Android build targets with Windows in the matrix of jobs: in .github/workflows/package-ffi-engine.yml.
• Added conditional logic for packaging and uploading artifacts based on the platform in .github/workflows/package-ffi-engine.yml.

SDK Updates:

• Added Windows platform support in flipt-client-dart/lib/src/flipt_evaluation_client.dart.
• Added Windows platform support in flipt-client-go/evaluation.go.
• Added Windows platform support in flipt-client-python/flipt_client/__init__.py.
• Updated library file paths to include Windows in flipt-client-ruby/lib/flipt_client.rb.
• Removed unused Node FFI packaging as its now using WASM

Codebase Simplification:

• Simplified the build process by removing unnecessary node build steps and focusing on essential includes in package/ffi/main.go. [1] [2] [3]
• Consolidated package management and downloading logic, including adding a function to get the latest engine tag in package/ffi/main.go. [1] [2]

These changes ensure that the build and packaging workflows are more robust and can handle multiple platforms, including Windows, while simplifying the codebase for better maintainability.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.42%. Comparing base (1377365) to head (e6d7ebb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #433      +/-   ##
==========================================
+ Coverage   87.35%   87.42%   +0.07%     
==========================================
  Files           9        9              
  Lines        3740     3737       -3     
==========================================
  Hits         3267     3267              
+ Misses        473      470       -3     

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[erka]

Nice!
It would be great to include the drop of node FFI in PR description as it was replaced with wasm. The PR has a lot of changes and without context that drop could look strange in the future