Scripts: Add .prettierignore, use in format script (#30844)

* Scripts: Include YAML files in prettification

* Move create-block's Changelog entry to Enhancement

* Scripts: Add prettierignore, use in format script

* Run format script

* Revert "Run format script"

This reverts commit d4afc4d.

* Add root-level .prettierignore

* Remove unnecessary line from .prettierignore

* Add README note about .prettierignore

* Add Changelog entry

.prettierignore

@@ -0,0 +1,8 @@
+.cache
+build
+build-module
+build-types
+packages/block-serialization-spec-parser/parser.js
+packages/e2e-tests/plugins
+packages/react-native-editor/bundle
+vendor

packages/scripts/CHANGELOG.md

@@ -5,6 +5,7 @@
 ### New Features
 
 -   Include a Jest Reporter that formats test results for GitHub Actions annotations ([#31041](https://github.com/WordPress/gutenberg/pull/31041)).
+-   Have the `format` command ignore files listed in a `.prettierignore` file, add a fallback `.prettierignore` to the package ([30844](https://github.com/WordPress/gutenberg/pull/30844)).
 
 ### Breaking Changes
 

packages/scripts/README.md

@@ -150,7 +150,7 @@ This is how you execute the script with presented setup:
 
 When you run commands similar to the `npm run format:src` example above, you can provide a file, a directory, or `glob` syntax or any combination of them.
 
-By default, files located in `build`, `node_modules`, and `vendor` folders are ignored.
+By default, files located in `build`, `node_modules`, and `vendor` folders are ignored. You can customize the list of ignored files and directories by adding them to a `.prettierignore` file in your project.
 
 ### `lint-js`
 

packages/scripts/config/.prettierignore

@@ -0,0 +1,2 @@
+build
+vendor

packages/scripts/scripts/format.js

@@ -79,13 +79,13 @@ if ( ! hasPrettierConfig() ) {
 	];
 }
 
-// If `--ignore-path` is not explicitly specified, use the project's or global .eslintignore
+// If `--ignore-path` is not explicitly specified, use the project's or global .prettierignore.
 let ignorePath = getArgFromCLI( '--ignore-path' );
 if ( ! ignorePath ) {
-	if ( hasProjectFile( '.eslintignore' ) ) {
-		ignorePath = fromProjectRoot( '.eslintignore' );
+	if ( hasProjectFile( '.prettierignore' ) ) {
+		ignorePath = fromProjectRoot( '.prettierignore' );
 	} else {
-		ignorePath = fromConfigRoot( '.eslintignore' );
+		ignorePath = fromConfigRoot( '.prettierignore' );
 	}
 }
 const ignoreArgs = [ '--ignore-path', ignorePath ];