Spring AI CallToolResult: support EmbeddedResources

Using org.springframework.ai.tool.annotation.Tool with return of io.modelcontextprotocol.spec.McpSchema.CallToolResult does not work for io.modelcontextprotocol.spec.McpSchema.EmbeddedResource;

Limitation is probably inside org.springframework.ai.mcp.McpToolUtils, which only provides ImageContent and TextContent but not io.modelcontextprotocol.spec.McpSchema.EmbeddedResource;

return new SharedSyncToolSpecification(tool, (exchangeOrContext, request) -> {
    try {
       String callResult = toolCallback.call(ModelOptionsUtils.toJsonString(request.arguments()),
             new ToolContext(Map.of(TOOL_CONTEXT_MCP_EXCHANGE_KEY, exchangeOrContext)));
       if (mimeType != null && mimeType.toString().startsWith("image")) {
          return new McpSchema.CallToolResult(List
             .of(new McpSchema.ImageContent(List.of(Role.ASSISTANT), null, callResult, mimeType.toString())),
                false);
       }
       return new McpSchema.CallToolResult(List.of(new McpSchema.TextContent(callResult)), false);
    }
    catch (Exception e) {
       return new McpSchema.CallToolResult(List.of(new McpSchema.TextContent(e.getMessage())), true);
    }
});