Add util for generating new tests/error documents (#33001)

* Add util for generating new tests/error documents

* update compiled

* lint-fix

* apply suggestions

* update wording

* update compiled

contributing.md

@@ -203,15 +203,8 @@ In general, all warnings and errors added should have these links attached.
 
 Below are the steps to add a new link:
 
-1. Create a new markdown file under the `errors` directory based on
-   `errors/template.md`:
-
-   ```shell
-   cp errors/template.md errors/<error-file-name>.md
-   ```
-
-2. Add the newly added file to `errors/manifest.json`
-3. Add the following url to your warning/error:
+1. Run `yarn new-error` which will create the error document and update the manifest automatically.
+2. Add the following url to your warning/error:
    `https://nextjs.org/docs/messages/<file-path-without-dotmd>`.
 
    For example, to link to `errors/api-routes-static-export.md` you use the url:

errors/template.md → errors/template.txt

@@ -1,4 +1,4 @@
-# <!-- INSERT TITLE HERE -->
+# {{title}}
 
 #### Why This Error Occurred
 

package.json

@@ -6,6 +6,8 @@
     "packages/*"
   ],
   "scripts": {
+    "new-error": "plop error",
+    "new-test": "plop test",
     "clean": "yarn lerna clean -y && yarn lerna bootstrap && yarn lerna exec 'rm -rf ./dist'",
     "build": "yarn prepublish",
     "lerna": "lerna",
@@ -128,6 +130,7 @@
     "nprogress": "0.2.0",
     "pixrem": "5.0.0",
     "playwright-chromium": "1.14.1",
+    "plop": "3.0.5",
     "postcss-nested": "4.2.1",
     "postcss-pseudoelements": "5.0.0",
     "postcss-short-size": "4.0.0",