feat: Add customizable URI template manager factory to MCP server

Implement URI template functionality for MCP resources, allowing dynamic
resource URIs with variables in the format {variableName}.

- Enable resource URIs with variable placeholders (e.g., "/api/users/{userId}")
- Automatic extraction of variable values from request URIs
- Validation of template arguments in completions
- Matching of request URIs against templates

- Add new URI template management interfaces and implementations
- Enhanced resource template listing to include templated resources
- Updated resource request handling to support template matching
- Test coverage for URI template functionality

- Adding a configurable uriTemplateManagerFactory field to both AsyncSpecification and SyncSpecification classes
- Adding builder methods to allow setting a custom URI template manager factory
- Modifying constructors to pass the URI template manager factory to the server implementation
- Updating the server implementation to use the provided factory
- Add bulk registration methods for async completions

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

mcp-spring/mcp-spring-webflux/src/test/java/io/modelcontextprotocol/WebFluxSseIntegrationTests.java

@@ -776,7 +776,8 @@ class WebFluxSseIntegrationTests {
 		var mcpServer = McpServer.sync(mcpServerTransportProvider)
 			.capabilities(ServerCapabilities.builder().completions().build())
 			.prompts(new McpServerFeatures.SyncPromptSpecification(
-					new Prompt("code_review", "this is code review prompt", List.of()),
+					new Prompt("code_review", "this is code review prompt",
+							List.of(new PromptArgument("language", "string", false))),
 					(mcpSyncServerExchange, getPromptRequest) -> null))
 			.completions(new McpServerFeatures.SyncCompletionSpecification(
 					new McpSchema.PromptReference("ref/prompt", "code_review"), completionHandler))