Added '@emotion/react' ESLint config

[JoshuaKGoldberg]

What:

Adds a new @emotion/react preset ESLint config users can extend from:

{
  "extends": ["@emotion/react"],
  "plugins": ["@emotion"]
}

It enables the relevant ESLint rules related to React.

Why:

How:

• Adds the exported config as an object
• Updates the eslint-plugin README.md docs to mention it
• Sorts rules alphabetically wherever they're listed 😈

Checklist:

• Documentation
• Tests
• Code complete
• Changeset

Is there a way you'd like me to include tests for this change?

[changeset-bot]

🦋 Changeset detected

Latest commit: 8880e80

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@emotion/eslint-plugin	Minor

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Latest deployment of this branch, based on commit 8880e80:

Sandbox	Source
Emotion	Configuration

[codecov]

Codecov Report

Merging #2960 (8880e80) into main (acb72a4) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Impacted Files	Coverage Δ
packages/eslint-plugin/src/index.js	100.00% <100.00%> (ø)