chore(project): migrate to pnpm

[hyrious]

Noticeable Changes:

• Many dev scripts are updated (to replace "yarn run xxx" with "pnpm"), including github actions. These scripts may fail and need more investigating. @BlackHole1 Please help reviewing this.
• Common devDependencies are hoisted to the root package.json instead of having several copies at each package, because pnpm will create different symlinks to them if they occured in difference place.
• ESLint is upgraded to 8 along with some eslint plugins. The eslint vite plugin was removed due to parsing errors. @BlackHole1 Please help reviewing this change and maybe fix it in the future.
• I tried running/building storybook locally and it works. @crimx Please help reviewing this change.

[BlackHole1]

forget changes:

• https://github.com/netless-io/flat/blob/main/scripts/ci/install-changed-package-dependencies.js
• https://github.com/netless-io/flat/blob/main/scripts/ci/remove-workspace-packages.js

[BlackHole1]

ready merge