docs: update contributing guidelines

[goffxnca]

• Added middlewares roles in the project structure.
• Updated test instructions, pnpm test script is no longer available on root package.json.
• Removed duplicate “A good bug report...” line.

---

PR-Codex overview

This PR updates the CONTRIBUTING.md file to improve clarity on project structure and testing procedures, including new sections on middleware and enhanced testing commands.

Detailed summary

• Changed context to contexts in project structure description.
• Added a section for middlewares, detailing their purpose.
• Expanded testing instructions to include:
  • pnpm test:ci for overall unit tests.
  • pnpm test:config for configuration changes verification.
  • pnpm e2e:ci for end-to-end testing.
• Added a note about automatic tests during PRs.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[changeset-bot]

⚠️ No Changeset found

Latest commit: 025abd9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
uikit	⬜️ Ignored (Inspect)	Visit Preview		Nov 7, 2024 7:16pm

[vercel]

@goffxnca is attempting to deploy a commit to the PancakeSwap Team on Vercel.

A member of the Team first needs to authorize it.