Implement gherkin linter in GH action

.distignore

@@ -17,6 +17,7 @@ tests
 .distignore
 .editorconfig
 .eslintrc.js
+.gherkin-lintrc
 .gitattributes
 .gitignore
 .nvmrc

.gherkin-lintrc

@@ -0,0 +1,26 @@
+{
+	"indentation": [
+		"on",
+		{
+			"Feature": 0,
+			"Background": 2,
+			"Scenario": 2,
+			"Examples": 4,
+			"Step": 4,
+			"given": 4,
+			"example": 6,
+			"and": 4
+		}
+	],
+	"no-dupe-feature-names": "on",
+	"no-dupe-scenario-names": "off",
+	"no-empty-file": "on",
+	"no-files-without-scenarios": "on",
+	"no-multiple-empty-lines": "on",
+	"no-partially-commented-tag-lines": "on",
+	"no-trailing-spaces": "on",
+	"no-unnamed-features": "on",
+	"no-unnamed-scenarios": "on",
+	"no-scenario-outlines-without-examples": "on",
+	"use-and": "on"
+}

.gitattributes

@@ -12,6 +12,7 @@
 
 /.editorconfig export-ignore
 /.eslintrc.js export-ignore
+/.gherkin-lintrc export-ignore
 /.nvmrc export-ignore
 /.wp-env.json export-ignore
 /composer.lock export-ignore

.github/workflows/gherkin-lint.yml

@@ -0,0 +1,46 @@
+name: Gherkin Linting
+
+on:
+  push:
+    branches:
+      - trunk
+      - 'release/**'
+    # Only run if PHP-related files changed.
+    paths:
+      - '.github/workflows/behat-test.yml'
+      - '**.php'
+      - '**.feature'
+      - 'behat.yml'
+      - 'composer.json'
+      - 'composer.lock'
+  pull_request:
+    branches:
+      - trunk
+      - 'release/**'
+      - 'feature/**'
+    # Only run if PHP-related files changed.
+    paths:
+      - '.github/workflows/behat-test.yml'
+      - '**.php'
+      - '**.feature'
+      - 'behat.yml'
+      - 'composer.json'
+      - 'composer.lock'
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  gherkin-lint:
+    name: Lint Gherkin Feature files
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out source code
+        uses: actions/checkout@v4
+
+      - name: Setup node
+        uses: actions/setup-node@v4
+
+      - name: Run lint
+        run: npx --yes gherkin-lint

tests/behat/features/plugin-check.feature

@@ -582,7 +582,8 @@ Feature: Test that the WP-CLI command works.
       ExampleRuntimeCheck.ForbiddenScript,WARNING
       """
 
-  Scenario: Check custom single file plugin that has no errors or warnings
+
+  Scenario: Check custom single file plugin without errors or warnings
     Given a WP install with the Plugin Check plugin
     And a wp-content/plugins/foo-single.php file:
       """