Configure prettier prose-wrap in .prettierrc instead of the CLI (#17184)

This also removes the file-specific targets from prettier execution
which means we're including `.json`, `.css`, and `.html` files, which
seems like an improvement.

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -104,9 +104,7 @@ jobs:
         run: cargo fmt --all --check
 
       - name: "Prettier"
-        run: |
-          npx prettier --check "**/*.{json5,yaml,yml}"
-          npx prettier --prose-wrap always --check "**/*.md"
+        run: npx prettier --check .
 
       - name: "README check"
         run: python scripts/transform_readme.py --target pypi