add vale style check

Author: geoffcline

.github/workflows/vale.yml

@@ -0,0 +1,27 @@
+name: Style check
+
+on:
+  pull_request:
+  workflow_dispatch:
+ 
+jobs:
+  style-job:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out
+        uses: actions/checkout@v3
+
+        # For AsciiDoc users:
+      - name: Install Asciidoctor
+        run: sudo apt-get install -y asciidoctor
+          
+      - name: Run Vale
+        uses: errata-ai/vale-action@reviewdog
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+        with:
+          fail_on_error: true
+          reporter: github-pr-check
+          filter_mode: added
+          files: latest/ug
+        continue-on-error: false

.vale.ini

@@ -0,0 +1,12 @@
+StylesPath = vale/styles
+
+Packages = RedHat, AsciiDoc
+
+# Ignore files in dirs starting with `.` to avoid raising errors for `.vale/fixtures/*/testinvalid.adoc` files
+[[!.]*.adoc]
+BasedOnStyles = RedHat, AsciiDoc
+RedHat.GitLinks = OFF 
+AsciiDoc.UnsetAttributes = OFF 
+RedHat.CaseSensitiveTerms = suggestion
+RedHat.TermsErrors = warning
+RedHat.Spacing = warning