Restructure Spring AI model module

 - Pull chat, image, moderation, tool, audio specific api code into spring-ai-model module
  - Move the corresponding tests

Signed-off-by: Ilayaperumal Gopinathan <ilayaperumal.gopinathan@broadcom.com>

Author: ilayaperumalg

spring-ai-core/src/main/java/org/springframework/ai/util/ParsingUtils.java renamed to spring-ai-commons/src/main/java/org/springframework/ai/util/ParsingUtils.java

@@ -73,19 +73,6 @@
 			<version>${jsonschema.version}</version>
 		</dependency>
 
-		<!-- production dependencies -->
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>ST4</artifactId>
-			<version>${ST4.version}</version>
-		</dependency>
-
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr4-runtime</artifactId>
-			<version>${antlr.version}</version>
-		</dependency>
-
 		<dependency>
 			<groupId>io.projectreactor</groupId>
 			<artifactId>reactor-core</artifactId>