chore: support orchestration file upload feature

docs-java/orchestration/chat-completion.mdx

@@ -495,7 +495,7 @@ config = config.withStreamConfig(
 
 ## Using Images
 
-It's possible to add images and multiple text inputs to a message.
+It's possible to add images, files, and multiple text inputs to a message.
 
 ### Add Images to a Message
 
@@ -521,6 +521,36 @@ var newMessage = message.withImage("https://url.to/image.jpg", ImageItem.DetailL
 
 Note, that currently only user messages are supported for image attachments.
 
+### Add File Attachment to a Message
+
+A file can be added to a message either via a file path or via a base64 encoded string as follows.
+Only PDF files are currently supported for file attachments.
+
+#### Add File via Local File Path
+
+```java
+var message = Message.user("What is the title of the topic discussed here?");
+var newMessage = message.withFile(Path.of("path/to/sample.pdf"));
+```
+
+#### Add File via Remote File Path
+
+Filename is an optional parameter to the `withFileUrl` method shown below and could be set to null.
+
+```java
+var message = Message.user("What is the title of the topic discussed here?");
+var newMessage = message.withFileUrl("https://somefile.pdf", "sample.pdf");
+```
+
+#### Add File via Base64 Encoded String
+
+```java
+var message = Message.user("What is the title of the topic discussed here?");
+var newMessage = message.withFileBase64(base64Data, "sample.pdf");
+```
+
+Note, that currently only user messages are supported for file attachments.
+
 ### Add Multiple Text Inputs to a Message
 
 It's also possible to add multiple text inputs to a message.
@@ -623,7 +653,7 @@ Please find [an example in our Spring Boot application](https://github.com/SAP/a
 
 Translate the input or output to [any supported language](https://help.sap.com/docs/translation-hub/sap-translation-hub/supported-languages?version=Cloud#translation-provider-sap-machine-translation).
 The following sample will translate the prompt into English, send it to the LLM, and then translate the output to German.
-Source Language is identified on the whole user input.
+The source language is identified from the whole user input.
 
 ```java
 var prompt = new OrchestrationPrompt("Quelle est la couleur de la tour Eiffel?");

styles/config/vocabularies/SAP/accept.txt

@@ -83,6 +83,7 @@ www
 semver
 XML
 MDX
+PDF
 classpath
 [Ss]ervlet
 [Aa]ccessor