docs: fix admonition syntax on landing page

[vinodmut]

Replace GitHub-flavored [!IMPORTANT] blockquote with MkDocs Material admonition syntax so it renders correctly.

For #140

Summary by CodeRabbit

• Documentation
  • Improved the visual presentation of a documentation callout block for better readability.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 5581c9fd-dd15-47d8-82e3-7c56d7b36840

📥 Commits

Reviewing files that changed from the base of the PR and between 77273dd and e6d5db1.

📒 Files selected for processing (1)

• docs/index.md

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📝 Walkthrough

Walkthrough

Updated the documentation homepage by converting an IMPORTANT callout block to a tip callout and reformatting the star repository message into a multi-line, indented structure with a title and supporting text.

Changes

Cohort / File(s)	Summary
Documentation docs/index.md	Replaced IMPORTANT callout with tip callout; reformatted star message from single-line to indented multi-line format with title and descriptive text.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• illeatmyhat
• visahak

Poem

🐰 A tip, a star, a gentle call,
The docs now shine for one and all,
From urgent tones to helpful ways,
Readers smile through all their days! ⭐

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'docs: fix admonition syntax on landing page' clearly and specifically describes the main change—fixing admonition syntax on the landing page, which aligns with the PR objective of replacing GitHub-flavored blockquote syntax with MkDocs Material admonition syntax.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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