🔧 chore(deps): bump dependencies to latest patch versions

[gfazioli]

• Update Next, React, React‑DOM to 19.2.1
• Upgrade shiki, prettier, stylelint, tsx, typescript‑eslint to newer patches
• Sync @types/react to 19.2.7
• Align docs package.json dependencies with root
• Minor TSX formatting: collapse interface extends lines for consistency

[Copilot]

Pull request overview

This PR performs routine dependency maintenance by updating packages to their latest patch versions, ensuring the project stays current with bug fixes and security patches.

• Updates React ecosystem packages (React, React-DOM, Next.js) to version 19.2.1 and 15.5.7 respectively
• Upgrades development tooling including prettier, stylelint, tsx, and typescript-eslint to newer patch versions
• Applies minor code formatting improvements by collapsing multi-line interface extends declarations

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Bumps devDependencies to latest patch versions for tooling and React types
docs/package.json	Updates Next.js, React, shiki, and type definitions to align with root package
yarn.lock	Reflects all dependency version updates with new checksums and transitive dependencies
package/src/Resizer/SplitResizer.tsx	Collapses SplitResizerProps interface extends clause onto single line
package/src/Pane/SplitPane.tsx	Collapses SplitPaneProps interface extends clause onto single line

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