Add Java module for Docling (#172)

Author: edeandrea

modules/docling/index.md

@@ -0,0 +1,36 @@
+---
+title: Docling
+categories:
+  - web
+  - cloud
+docs:
+  - id: java
+    url: https://docling-project.github.io/docling-java/current/testcontainers/
+    maintainer: official
+    example: |
+      ```java
+      var doclingContainer = new DoclingServeContainer(
+        DoclingServeContainerConfig.builder()
+          .image(DoclingServeContainerConfig.DOCLING_IMAGE)
+          .enableUi(true)
+          .build()
+      );
+      doclingContainer.start();
+      ```
+    installation: |
+      ```xml
+      <dependency>
+        <groupId>ai.docling</groupId>
+        <artifactId>docling-testcontainers</artifactId>
+        <version>${docling.version}</version>
+        <scope>test</scope>
+      </dependency>
+      ```
+description: |
+  The `docling-testcontainers` module provides a ready-to-use Testcontainers integration for running a [Docling Serve](https://github.com/docling-project/docling-serve) instance, wrapping the official container image and exposing a simple Java API.
+
+  Use this module when:
+  - You want end-to-end tests that run against a real Docling Serve instance.
+  - You need a portable, reliable way to boot Docling Serve in your CI pipelines.
+  - You want a conventient and familiar Java API to tweak the container image, environment variables, startup timeout, and optional UI.
+---