ci(vale): add a pr check workflow for vale

Add a pull request driven workflow for vale. This is based on the
upstream action documentation [1].

[1] https://github.com/errata-ai/vale-action

Signed-off-by: Randolph Sapp <rs@ti.com>

Author: StaticRocket

.github/workflows/vale.yml

@@ -0,0 +1,19 @@
+---
+name: "vale"
+
+on: [pull_request]
+
+jobs:
+  vale:
+    name: vale
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install docutils
+        run: sudo apt-get install -y docutils
+
+      - name: Run vale checks
+        uses: errata-ai/vale-action@v2.1.1