poc: connect module

[WojtekTheWebDev]

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🔗 Linked issue

IN-3860

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSDoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [x] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

PoC of new middlewareModule, a new standard way of communicating with the Server Middleware. As it's PoC, it does not contains the docs, changesets, proper test coverage or a final file structure.

📝 Checklist

• [x] I have linked an issue or discussion.
• [x] I have updated the documentation accordingly.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: d90302cd6c656a27df0842bc66265d926bf590af

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

This PR includes no changesets

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[WojtekTheWebDev]

It's going to be separated to smaller PRs to review it easier.

[WojtekTheWebDev]

Duplicated by: https://github.com/vuestorefront/vue-storefront/pull/7052