docs: Describe how to set up VS Code integration

Author: Zash

config/schemas/README.md

@@ -84,3 +84,16 @@ EOF
 ```
 
 The output can be tweaked and inserted into `config/schemas/config.yaml` under `.properties`.
+
+## VSCode
+
+The plugin `redhat.vscode-yaml` can provide auto completion, validation and help texts from the schema.
+This can be enabled this in other repositories by editing the file `.vscode/settings.json`, adding the path or URL to the schema under the key `.["yaml.schemas"]` like below:
+
+```json
+{
+  "yaml.schemas": {
+    ".../path/to/ck8s-apps/config/schemas/config.yaml": "config/config/*-config.yaml"
+  }
+}
+```