docs: updating readme to add tooling section that links to eslint-plugin

[georgewrmarshall]

Description

This pull request updates the README file to include a new section on tooling, specifically adding a reference to eslint-plugin. The motivation behind this change is to provide developers and contributors with quick access to the tools we use for maintaining code quality. This addition will help new contributors set up their development environments more efficiently.

Related issues

Fixes: #640

Manual testing steps

1. Open the README file.
2. Verify that the new section on tooling is present and includes a link to eslint-plugin.
3. Ensure the link is correctly formatted and accessible.

Screenshots/Recordings

Before

before720.mov

After

after720.mov

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained what problem this PR is solving and how it is solved.
• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[georgewrmarshall]

spelling error fix

[brianacnguyen]

nice

[metamaskbot]

Builds ready [69e7a93]

Storybook: Storybook

[metamaskbot]

Builds ready [1291290]

Storybook: Storybook

[metamaskbot]

Builds ready [7acd51a]

Storybook: Storybook