release(docs): bump version to 0.6.0 and update generated client wrapper screenshots

- Bumped project version to 0.6.0 in all pom.xml files (service & client)
- Replaced outdated screenshots (`before` and `after`) with updated versions
- Screenshots now show correct folder structure (`src/gen/java`)
- Keeps documentation and artifacts aligned with latest client generation changes

Author: bsayli

customer-service-client/pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.github.bsayli</groupId>
     <artifactId>customer-service-client</artifactId>
-    <version>0.6.0-SNAPSHOT</version>
+    <version>0.6.0</version>
     <name>customer-service-client</name>
     <description>Generated client (RestClient) using generics-aware OpenAPI templates</description>
     <packaging>jar</packaging>

customer-service-client/src/main/resources/customer-api-docs.yaml

@@ -2,7 +2,7 @@ openapi: 3.1.0
 info:
   title: Customer Service API
   description: "Demo: type-safe generic API responses with OpenAPI"
-  version: 0.6.0-SNAPSHOT
+  version: 0.6.0
 servers:
   - url: http://localhost:8084/customer-service
     description: Local service URL

customer-service/pom.xml

@@ -13,7 +13,7 @@
 
     <groupId>com.example.demo</groupId>
     <artifactId>customer-service</artifactId>
-    <version>0.6.0-SNAPSHOT</version>
+    <version>0.6.0</version>
     <name>customer-service</name>
     <description>Demo service: Spring Boot 3.4 + Springdoc (OpenAPI) for generics-aware client generation</description>