V10.0.8/fix mac os culture mapping

[gimlichael]

This pull request enhances support for additional ICU-only cultures, particularly those surfaced by macOS 26, by updating both the project file and the ICU-to-NLS mapping logic. It ensures that new surrogate culture files are included as embedded resources and that appropriate fallback mappings are defined for these cultures, improving compatibility and localization handling across platforms.

ICU surrogate file management:

• Added over 100 new surrogate .bin files to the EmbeddedResource list in Codebelt.Extensions.Globalization.csproj to support ICU-only cultures, and removed them from the None list to ensure they are packaged with the assembly.

ICU-to-NLS mapping improvements:

• Extended the ICU-to-NLS fallback mapping in WriteIcuNamedNlsAlternatives() to include:
  • Script/language aliases newly surfaced by macOS 26 ICU, such as ber-Latn-MA → tzm-Latn-MA.
  • English and Spanish regional fallbacks for macOS 26 ICU-only cultures (e.g., en-AL → en-001, es-003 → es-419).
  • Geographic/regional fallbacks for ICU-only cultures with no NLS equivalent, mapping to the closest available culture (e.g., ain-JP → ja-JP).

[greptile-apps]

Greptile Summary

This PR extends localization support for ICU-only cultures surfaced by macOS 26, adding ~113 new surrogate .bin files as embedded resources and wiring up their ICU-to-NLS fallback mappings in the gse tooling program.

• Program.cs: ~100 new dictionary entries added to WriteIcuNamedNlsAlternatives(), organized into script aliases (e.g. ber-Latn-MA → tzm-Latn-MA), English/Spanish regional fallbacks (e.g. en-AL → en-001, es-AG → es-419), and geographic language fallbacks (e.g. ain-JP → ja-JP). The runtime file-copy logic and File.Exists guards are unchanged.
• Codebelt.Extensions.Globalization.csproj: Each new .bin file is correctly removed from None and re-added as EmbeddedResource using the project's established MSBuild pattern.

Confidence Score: 5/5

This PR is safe to merge — it adds new culture mappings and embedded resources without modifying any existing logic.

The changes are purely additive: new dictionary entries appended to an existing map, new .bin files registered as embedded resources. The runtime loop and file-copy code paths are untouched. Every new ICU→NLS target (en-001, es-419, ja-JP, etc.) was already reachable via existing entries, so missing-file edge cases are already handled by the File.Exists guards in place. No existing behavior is altered.

No files require special attention.

Important Files Changed

Filename	Overview
tooling/gse/Program.cs	Extends WriteIcuNamedNlsAlternatives() with ~100 new ICU-to-NLS fallback entries covering macOS 26 script aliases, English/Spanish regional cultures, and minority-language geographic fallbacks; existing loop and file-copy logic is unchanged.
src/Codebelt.Extensions.Globalization/Codebelt.Extensions.Globalization.csproj	Registers 113 new surrogate .bin files: removes each from the None item group and re-adds as EmbeddedResource, following the established MSBuild pattern for the project.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[gse Program.cs runs] --> B[WriteSurrogate for each NLS CultureInfo]
    B --> C[Writes .bin + .yml per culture]
    A --> D[WriteIcuNamedNlsAlternatives]
    D --> E{For each ICU→NLS mapping}
    E --> F[TryWriteNlsSurrogate ICU name]
    F -->|Windows NLS supports it| G[Write native surrogate for ICU name]
    F -->|ICU-only - not in NLS| H{NLS fallback .bin exists?}
    H -->|Yes| I[Copy fallback .bin to ICU name .bin]
    H -->|No| J[Skip silently]
    I --> K[ICU name surrogate ready]
    G --> K
    K --> L[Embedded in .csproj as EmbeddedResource]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d1acc14) to head (fc0c4b1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files            4         4           
  Lines          184       184           
  Branches         4         4           
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  Hits           184       184           

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