refactor: update MCP API usage to version 0.8.0

- Remove all book-library MCP examples (servlet, webflux, and webmvc implementations)
- Update weather example to use MCP version 0.8.0-SNAPSHOT
- Refactor transport handling to use transport providers instead of direct transport objects
- Update method calls from toSyncToolRegistration to toSyncToolSpecifications
- Add central-portal-snapshots repository to pom.xml for dependency resolution
- Align with the new MCP client class names

Add MCP Sampling capability with weather example

Adds MCP Sampling implementation that demonstrates how to delegate LLM requests to multiple providers.

- add a weather server that retrieves data and uses MCP Sampling to generate creative content
- add a client that routes requests to different LLM providers (OpenAI and Anthropic) based on model hints
- add README documentation explaining the MCP Sampling workflow and implementation details

The MCP Sampling capability enables applications to leverage multiple LLM providers within a single workflow,
allowing for creative content generation, model comparison, and specialized task delegation.

refactor: migrate to spring-ai-mcp-client-spring-boot-starter

- Replace spring-ai-mcp dependency with spring-ai-mcp-client-spring-boot-starter
- Update import statements from org.springframework.ai.mcp.* to io.modelcontextprotocol.client.*
- Replace McpFunctionCallback with SyncMcpToolCallbackProvider
- Update Spring AI version from 1.0.0-M5 to 1.0.0-SNAPSHOT in multiple projects
- Enable tool callback auto-configuration with spring.ai.mcp.client.toolcallback.enabled

refactor: update Spring AI artifact IDs to new naming convention

- Update all Spring AI dependencies to use the new naming convention:
spring-ai-*-spring-boot-starter → spring-ai-starter-*
spring-ai-openai-spring-boot-starter → spring-ai-starter-model-openai
spring-ai-mcp-client-spring-boot-starter → spring-ai-starter-mcp-client
- And similar patterns for other artifacts
- Enable debug mode in brave module's application.properties

Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>

model-context-protocol/sampling/mcp-sampling-client/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar