docs: update quick-start & add migration.md

[mortalYoung]

简介

• 更新快速开始文档
• 新增迁移文档

[codecov]

Codecov Report

Merging #784 (12cb1cc) into main (c984530) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #784   +/-   ##
=======================================
  Coverage   91.04%   91.04%           
=======================================
  Files         180      180           
  Lines        5786     5786           
  Branches     1402     1402           
=======================================
  Hits         5268     5268           
  Misses        512      512           
  Partials        6        6           

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[wewoor]

+1