refactor: rewrite config schema in zod (#56383)

The PR supersedes the #53150, which is way too outdated, has way too many conflicts, and also heavily relies on GitHub Copilot (which makes the progress slow and tedious).

The PR uses [`json-schema-to-zod`](https://github.com/StefanTerdell/json-schema-to-zod) (instead of the GitHub Copilot) to generate the zod schema, and manually replaces all generated `z.customRefine` with my hand-written zod schema.

TODO:

- [x] Convert schema
- [x] Reduce `z.any()` usage
- [x] Create human-readable errors from the `ZodError`
- [x] Update test cases to reflect the latest error message

-----

The benefit of using zod over ajv:

- Easier maintenance: zod schema is straightforward to compose.
- Better typescript support: config schema now strictly reflects the `NextConfig` type.
- Smaller installation size: by replacing `ajv` and `@segment/ajv-human-errors` w/ `zod`, I am able to reduce installation size by 114 KiB.
- Better Extension: the zod error message is easy to customize.

-----

In the previous PR #56083, @feedthejim replaces `zod` w/ `superstruct`. `superstruct` is lightweight and fast, which makes it perfect for creating simple schemas for RSC payload. But, this also means `superstruct` has its limitations compared to `zod`:

- `superstruct`'s syntax is different, and some utilities's usage is counter-intuitive:
  - `z.array(z.string()).gt(1)` vs `s.size(s.array(s.string()), 1)`
  - `z.numer().gt(1)` vs `s.size(s.number(), 1)`, `s.min(s.number(), 1)`
  - `z.boolean().optional().nullable()` vs `s.nullable(s.optional(z.boolean()))`
- `superstruct` has weaker TypeScript support and worse DX compared to `zod` when composing huge schema:
  - `zod.ZodType + z.object()` can provide a more detailed type mismatch message on which specific property is the culprit, while `Describe + s.object()` provides almost no information at all.
- `zod`'s schema is more powerful
  - `z.function()` supports `z.args()` and `z.returns()`, while `superstruct` only has `s.func()`
  - zod also has Promise type `z.promise()` and intersection type `z.and()`
- `superstruct`'s error is harder to parse compared to `zod`'s `ZodError` 

So in the PR, I re-introduced `zod` for `next.config.js` validation.

Author: SukkaW

packages/next/package.json

@@ -151,7 +151,6 @@
     "@next/swc": "13.5.5-canary.2",
     "@opentelemetry/api": "1.4.1",
     "@playwright/test": "^1.35.1",
-    "@segment/ajv-human-errors": "2.1.2",
     "@taskr/clear": "1.1.0",
     "@taskr/esnext": "1.1.0",
     "@types/amphtml-validator": "1.0.0",
@@ -194,7 +193,6 @@
     "@vercel/nft": "0.22.6",
     "@vercel/turbopack-ecmascript-runtime": "https://gitpkg-fork.vercel.sh/vercel/turbo/crates/turbopack-ecmascript-runtime/js?turbopack-231002.1",
     "acorn": "8.5.0",
-    "ajv": "8.11.0",
     "amphtml-validator": "1.0.35",
     "anser": "1.4.9",
     "arg": "4.1.0",
@@ -314,7 +312,8 @@
     "webpack": "5.86.0",
     "webpack-sources1": "npm:[email protected]",
     "webpack-sources3": "npm:[email protected]",
-    "ws": "8.2.3"
+    "ws": "8.2.3",
+    "zod": "3.22.3"
   },
   "engines": {
     "node": ">=16.14.0"

packages/next/src/compiled/sass-loader/cjs.js

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Colin McDonnell
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/next/src/compiled/zod/LICENSE

@@ -0,0 +1 @@
+{"name":"zod","main":"index.js","author":"Colin McDonnell <[email protected]>","license":"MIT"}