Add workflow files

.github/workflows/json-schema.yml

@@ -0,0 +1,21 @@
+name: JSON Schema Validation
+on: [pull_request]
+jobs:
+  validate-json-schema:
+      name: Validate JSON schema
+      permissions:
+        contents: read
+      runs-on: ubuntu-latest
+      steps:
+        - name: Check for any changed json schema files
+          id: check-for-changed-schemas
+          uses: tj-actions/changed-files@v41
+          with:
+            files: |
+              json-schema/**.json
+        - name: Validate JSON Schema
+          if: steps.check-for-changed-schemas.outputs.any_changed == 'true'
+          uses: dsanders11/json-schema-validate-action
+          with:
+            schema: https://json-schema.org/draft/2020-12/schema
+            files: json-schema/**.json

.github/workflows/markdown-links.yml

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+name: Markdown Link Validation
+on: [pull_request]
+jobs:
+  validate-markdown-links:
+    name: runner / linkspector
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run linkspector
+        uses: umbrelladocs/action-linkspector@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          reporter: github-pr-review
+          fail_on_error: true