I tried hard to understand the goal of this keystonejs project

package structure of sub-module

root package.json

{
  "name": "@keystone-6/mono-repo",
  "description": "KeystoneJS monorepo for all the @keystone-6 packages",
  "private": true,
  "version": "0.0.0",
  "author": "The KeystoneJS Development Team",
  "license": "MIT",
  "repository": "https://github.com/keystonejs/keystone",
  "homepage": "https://github.com/keystonejs/keystone",
  "scripts": {
    "prisma": "prisma",
    "docs": "manypkg run @keystone-6/website dev",
    "coverage": "cross-env DISABLE_LOGGING=true NODE_ENV=test jest --runInBand --coverage",
    "format:file": "prettier --write",
    "format": "prettier --write \"**/*.{js,json,ts,tsx,md,mdx}\" && remark . --output",
    "fresh": "yarn clean && yarn",
    "clean": "rimraf \"**/node_modules\" \"**/yarn-error.log\" \"**/out.log\" \"**/.DS_Store\" \"**/dist\"",
    "lint:eslint": "eslint . --ext ts,tsx,js",
    "lint:prettier": "prettier --list-different \"**/*.{js,json,ts,tsx}\"",
    "lint:markdown": "remark . --frail --quiet",
    "lint:types": "tsc",
    "lint": "yarn lint:prettier && yarn lint:eslint && yarn lint:markdown && yarn lint:types && yarn lint:filters",
    "test": "yarn lint && yarn test:unit",
    "test:unit": "cross-env DISABLE_LOGGING=true NODE_ENV=test jest --no-watchman --runInBand --logHeapUsage",
    "test:unit:debug": "cross-env NODE_ENV=test node --inspect-brk `which jest` --runInBand",
    "test:admin-ui": "yarn jest tests/admin-ui-tests",
    "benchmark": "yarn workspace @keystone-6/benchmarks-legacy go",
    "changeset": "changeset",
    "publish-changed": "yarn build && changeset publish --public",
    "version-packages": "changeset version",
    "build": "preconstruct build",
    "prepare": "manypkg check && preconstruct dev && yarn run --silent contributing-guide && node scripts/generate-artifacts-for-projects",
    "contributing-guide": "is-ci && exit 0 || chalk -t \"{bold