ci: Use dprint to format documentation + TOML files (#3426)

Adds Rust-based standardized markdown formatting and a CI step to catch unformatted files.

.github/workflows/format-workflow.yml

@@ -0,0 +1,17 @@
+name: Format + Docs Workflow
+on:
+  push:
+    paths: ["docs/**","**.md","**.toml","**.js","**.json","**.ts"]
+  pull_request:
+    paths: ["docs/**","**.md","**.toml","**.js","**.json","**.ts"]
+
+jobs:
+  # Run the dprint code formatter for documentation
+  dprint:
+    name: Dprint [Docs Formatter]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup | Checkout
+        uses: actions/checkout@v2.4.0
+      - name: Docs | Format
+        uses: dprint/check@v2.0