Add Week 7R notes

[Chloezhu010]

Week 7R Verkle tree notes: https://ab9jvcjkej.feishu.cn/docx/C6VMdpDDHoRq2XxGmKicy0E3nng

[github-actions]

Hi @Chloezhu010,

Following typos were found in the pull request:

• 📄 ./docs/wiki/research/scaling/data-availability.md:
  1. eg

ℹ️ Here's how to fix them:

• Fix typos: Open the relevant files and fix any identified typos.
• Update wordlist: If a flagged word is actually a project-specific term add it to wordlist.txt in the project root.
  Each word should be listed on a separate line. Learn more.
• 🚧 Remember:
  • When adding new words it MUST NOT have any spaces or special characters within or around it.
  • wordlist is NOT case sensitive.
  • Use backticks to quote code variables so as to not bloat the wordlist.