chore: add schema validation docs (#748)

Co-authored-by: @Racer159 <wayne@defenseunicorns.com>
Co-authored-by: Tristan Holaday <40547442+TristanHoladay@users.noreply.github.com>

docs/schema-validation.md

@@ -0,0 +1,42 @@
+## Schema Validation
+
+When working with UDS configuration files, it can be useful to setup your IDE to know about the various schemas that UDS uses.
+
+The recommended method of validating schemas is by the use of `yaml-language-server` file headers:
+
+For `uds-bundle.yaml`
+```yaml
+# yaml-language-server: $schema=https://raw.githubusercontent.com/defenseunicorns/uds-cli/main/uds.schema.json
+```
+
+For `zarf.yaml`
+```yaml
+# yaml-language-server: $schema=https://raw.githubusercontent.com/defenseunicorns/uds-cli/main/zarf.schema.json
+```
+
+For `tasks.yaml`
+```yaml
+# yaml-language-server: $schema=https://raw.githubusercontent.com/defenseunicorns/uds-cli/main/tasks.schema.json
+```
+
+This method works with both VSCode and Goland (Jetbrains IDEs).
+
+### Other IDE-specific Methods
+
+### VS Code
+
+To do this in VS Code you can install the [YAML Extension](https://marketplace.visualstudio.com/items?itemName=redhat.vscode-yaml) and add the following to your `settings.json` (pinning `main` to your UDS CLI version if desired):
+
+```json
+    "yaml.schemas": {
+        "https://raw.githubusercontent.com/defenseunicorns/uds-cli/main/uds.schema.json": "uds-bundle.yaml"
+    },
+```
+
+#### Goland (Jetbrains IDEs)
+
+Use this method if you want to apply the schema to all YAML files in your project without modifying them. Open the IDE settings and navigate to `Languages & Frameworks` -> `Schemas and DTDs` -> `JSON Schema Mappings` and add a new schema using the "+" icon as shown below:
+
+![Goland Schema Mapping](.images/goland-json-schema.png)
+
+Don't forget to set the file path pattern for the JSON schema to apply to.