Replace codespell with Vale spelling check (#98406)

.github/CODEOWNERS

@@ -32,10 +32,10 @@
 /devenv/README.md @grafana/docs-grafana
 
 # START Technical documentation
+/.vale.ini
 # `make docs` procedure and related workflows are owned @grafana/docs-tooling. Slack #docs.
 /docs/                                                                            @grafana/docs-tooling
 
-/docs/.codespellignore                                                            @grafana/docs-tooling
 /docs/sources/                                                                    @irenerl24
 
 /docs/sources/alerting/                                                           @brendamuir
@@ -757,6 +757,7 @@ embed.go @grafana/grafana-as-code
 /.github/workflows/commands.yml @torkelo
 /.github/workflows/community-release.yml @grafana/grafana-developer-enablement-squad
 /.github/workflows/detect-breaking-changes-* @grafana/plugins-platform-frontend
+/.github/workflows/documentation-ci.yml @grafana/docs-tooling
 /.github/workflows/doc-validator.yml @grafana/docs-tooling
 /.github/workflows/deploy-pr-preview.yml @grafana/docs-tooling
 /.github/workflows/epic-add-to-platform-ux-parent-project.yml @meanmina

.github/workflows/documentation-ci.yml

@@ -0,0 +1,19 @@
+name: Documentation CI
+on:
+  pull_request:
+    paths: ["docs/sources/**"]
+  workflow_dispatch:
+jobs:
+  vale:
+    runs-on: ubuntu-latest
+    container:
+      image: grafana/vale:latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - uses: grafana/writers-toolkit/vale-action@4b1248585248751e3b12fd020cf7ac91540ca09c # vale-action/v1.0.0
+        with:
+          filter: |
+            '.Name in ["Grafana.WordList", "Grafana.Spelling", "Grafana.ProductPossessives"]'
+          token: ${{ secrets.GITHUB_TOKEN }}