Remove browsers and devices documentation page

[Copilot]

Description

Removed the browsers and devices documentation page and all references to it:

• Deleted site/src/content/docs/getting-started/browsers-devices.mdx
• Removed "Browsers & devices" entry from sidebar navigation in site/data/sidebar.yml
• Updated modal component documentation to remove broken link while preserving mobile device caveat information
• Added browser support section to site/src/content/docs/getting-started/introduction.mdx under "Important globals" with .browserslistrc reference and Autoprefixer/Browserslist information

Motivation & Context

Documentation consolidation - the browsers and devices page is no longer needed as a standalone page. Key browser support information has been moved to the Introduction page for better discoverability.

Type of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would change existing functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Live previews

• https://deploy-preview-{your_pr_number}--twbs-bootstrap.netlify.app/

Related issues

Original prompt

Remove the browsers and devices page from our docs. Be sure to remove the page, the sidebar link, and identify any links within the docs content to this page.

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[mdo]

@copilot Lets add this line at site/src/content/docs/getting-started/browsers-devices.mdx:13 to our Introduction.mdx page under a new heading under Important globals

[Copilot]

@copilot Lets add this line at site/src/content/docs/getting-started/browsers-devices.mdx:13 to our Introduction.mdx page under a new heading under Important globals

Done. Added a new "Browser support" subsection under "Important globals" in Introduction.mdx with the browser support information, including the .browserslistrc reference and Autoprefixer/Browserslist details. (8dade24)