docs: add v0.4 news and minor touch up to front page readme

[euronymous-aithal]

minor changes to readme

What does this PR do ?

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Additional Information

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Summary by CodeRabbit

• Documentation
  • Refreshed README with a centered title and CI/Python badges.
  • Updated links to Nvidia Docs and polished Overview text.
  • Expanded News section, including a summary of On-policy Distillation.
  • Highlighted Ray-based resource management and PyTorch-native prototype; reordered feature emphasis.
  • Adjusted table of contents and anchors; simplified SFT naming.
  • Added notes on environment setup and usage.

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📝 Walkthrough

Walkthrough

README.md updated: centered title block, CI/Python badges, revised navigation/TOC, updated documentation links, expanded News and Overview, minor wording/polish, and SFT naming adjustments in tables.

Changes

Cohort / File(s)	Summary of Changes
Docs README.md	Reformatted header to centered HTML; added CI/Python badges; updated docs domain links; expanded News with new bullets; enhanced Overview with Ray resource management and PyTorch-native prototype notes; adjusted TOC and anchors; renamed SFT table row; minor notes/polish added.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• docs: Restructure README with backend-specific quick start and setup guides #1091 — Also restructures README TOC/sections and renames/reformats SFT-related entries.

Suggested labels

documentation

Suggested reviewers

• terrykong
• snowmanwwg

Pre-merge checks and finishing touches

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.
Test Results For Major Changes	✅ Passed	The PR only updates documentation in README.md with formatting and content tweaks, which qualifies as a minor change, so the custom check passes even without documented tests.
Title check	✅ Passed	The title accurately describes the main changes: adding v0.4 news and updating the README front page with minor refinements.

✨ Finishing touches

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• Post copyable unit tests in a comment
• Commit unit tests in branch euronymous-aithal-patch-1

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 557b7ec and c91fae8.

📒 Files selected for processing (1)

• README.md (3 hunks)

🧰 Additional context used

🪛 markdownlint-cli2 (0.18.1)

README.md

3-3: Headings must start at the beginning of the line

(MD023, heading-start-left)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)

• GitHub Check: Lint check
• GitHub Check: Post automodel integration comment / Comment on PR
• GitHub Check: Post submodule check comment / Comment on PR

[terrykong]

there was some issues with the build for this PR, i'll take this one over