Add documentation for continueAfterFailure

Author: amithkk

docs/testing/test-configuration.mdx

@@ -61,7 +61,28 @@ export default {
 
 Magnitude checks if `webServer.url` is already reachable. If so and `reuseExistingServer` is `true`, the command is skipped. The server process is killed automatically once the test run completes.
 
-## Test URL resolution
+## Test failure behaviour
+
+The default behaviour for failed tests is to terminate execution after the first failed test. To change this and allow other tests to run regardless of failed tests, you can either
+
+- Run magnitude with the `--no-fail-fast` CLI flag
+- Add `continueAfterFailure: true` to your `magnitude.config.ts`
+
+Example:
+
+```typescript
+import { type MagnitudeConfig } from 'magnitude-test';
+
+export default {
+    url: "...",
+    continueAfterFailure: true,
+    llm: {
+        //...
+    }
+} satisfies MagnitudeConfig;
+```
+
+## Test URL resolution 
 
 Each test uses a URL that is built from the broader scope of configuration in this order: