Refresh ML.NET documentation and native dependency setup

[svick]

Summary

• remove the obsolete Korean and oneDAL READMEs while preserving maintained oneDAL guidance
• remove outdated community links, package-installation commands, pipeline badges, build guidance, and Static API references
• refresh TensorFlow, platform-support, contribution, release, and developer documentation
• add an ML.NET-owned native dependency installer that includes OpenMP setup and use it consistently in CI and contributor guidance
• rename the cookbook sample test class after removing the obsolete Dynamic API distinction

Historical release notes and ROADMAP.md were intentionally left unchanged.

Validation

• validated the dependency installer with Podman on Ubuntu, Debian, Fedora, Amazon Linux, Alpine, Azure Linux, CentOS, and RHEL; automatic installation succeeds on the documented supported distributions, while the manual-install warning is emitted for the others
• validated the macOS installer branch with mocked commands because macOS containers are unavailable
• built the repository in Debug configuration
• ran all 15 CookbookSamples tests on net8.0

[Copilot]

Copilot review overview

🟡 Changes recommended

Build prerequisites, command paths, and platform configuration guidance need corrections so contributors can follow the refreshed documentation successfully.

Review effort: Balanced
Findings: 6

Open (6)

• Clone the repository before running the dependency script · New
• Avoid running Homebrew bundle as root on macOS · New
• Add OpenMP prerequisites to the dependency script · New
• Document setting MLNET_BACKEND before application startup · New
• Use forward-slash project paths in dotnet commands · New
• Document x86 restrictions and LightGBM inference support · New

What changed in this PR

Refreshes ML.NET’s user and contributor documentation while preserving historical release notes and ROADMAP.md.

Changes:

• Removes obsolete READMEs and Static API references.
• Updates build, platform, TensorFlow, contribution, and release guidance.
• Preserves oneDAL guidance and renames the cookbook sample test class.

File	Description
test/​Microsoft.ML.Tests/​Scenarios/​Api/​CookbookSamples/​CookbookSamples.cs	Renames the class and cleans up comments.
README.md	Refreshes installation, platform, and CI information.
README.ko-KR.md	Removes the obsolete localized README.
README-oneDAL.md	Removes the standalone oneDAL README.
docs/​README.md	Updates macOS terminology.
docs/​project-docs/​release-process.md	Updates terminology and installation command.
docs/​project-docs/​platform-limitations.md	Revises architecture and native-component limitations.
docs/​project-docs/​developer-guide.md	Refreshes build and test instructions.
docs/​project-docs/​contributing.md	Updates contribution guidance link.
docs/​project-docs/​components-and-dependencies.md	Preserves oneDAL activation guidance.
docs/​code/​MlNetCookBook.md	Removes obsolete Static API references.
docs/​building/​windows-instructions.md	Updates Windows build prerequisites.
docs/​building/​unix-instructions.md	Replaces outdated dependency instructions.
docs/​api-reference/​tensorflow-usage.md	Refreshes CPU and GPU runtime guidance.
CONTRIBUTING.md	Updates contributor resources and headings.
.github/​copilot-instructions.md	Clarifies SDK selection and CI roles.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.26%. Comparing base (cd77dea) to head (67c78a6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7760      +/-   ##
==========================================
+ Coverage   70.25%   70.26%   +0.01%     
==========================================
  Files        1419     1419              
  Lines      272569   272569              
  Branches    27938    27938              
==========================================
+ Hits       191493   191529      +36     
+ Misses      73661    73632      -29     
+ Partials     7415     7408       -7     

Flag	Coverage Δ
Debug	70.26% <100.00%> (+0.01%)	⬆️
production	64.52% <ø> (+0.01%)	⬆️
test	89.78% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...s/Scenarios/Api/CookbookSamples/CookbookSamples.cs	95.89% <100.00%> (ø)

... and 8 files with indirect coverage changes

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[Copilot]

🟡 Changes recommended

The cookbook contains an invalid, unbounded snippet, and TensorFlow GPU guidance incorrectly limits the packages to inference.

2 open findings

• GPU redistributables support training, not just inference · New
• Row-limiting snippet is invalid and omits Take(...).ToArray() · New

6 resolved since last review

• Document x86 restrictions and LightGBM inference support
• Use forward-slash project paths in dotnet commands
• Document setting MLNET_BACKEND before application startup
• Add OpenMP prerequisites to the dependency script
• Avoid running Homebrew bundle as root on macOS
• Clone the repository before running the dependency script

🧠 Review effort: Balanced

[Copilot]

🔵 Needs a closer look

Cross-platform installer behavior and support claims span environments that cannot be fully verified from the repository snapshot.

0 open findings

2 resolved since last review

• Row-limiting snippet is invalid and omits Take(...).ToArray()
• GPU redistributables support training, not just inference

🧠 Review effort: Balanced