refactor(netlify-blobs): update to v7

[ascorbic]

🔗 Linked issue

#406 updates the dependency without fixing the imports in tests

❓ 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)
• ✨ 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

Netlify Blobs are coming out of beta, and the latest version of the client has breaking changes to the local server used in tests. This PR updates the client and changes the imports for the tests. It also updates the docs to remove the reference to beta and add usage information for edge functions.

📝 Checklist

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.04%. Comparing base (4d61c78) to head (3cd1fd7).
Report is 8 commits behind head on main.

❗ Current head 3cd1fd7 differs from pull request most recent head 2d446c8. Consider uploading reports for the commit 2d446c8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #407      +/-   ##
==========================================
+ Coverage   65.05%   66.04%   +0.98%     
==========================================
  Files          39       39              
  Lines        4055     4055              
  Branches      487      503      +16     
==========================================
+ Hits         2638     2678      +40     
+ Misses       1408     1368      -40     
  Partials        9        9              

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[pi0]

Thanks!

I made some quick changes to the docs ordering. Feel free to amend it later 👍🏼