Module and Package restructoring

- mcp-transport -> mcp-spring
- mcp-webflux-sse-transport -> mcp-spring-webflux
 - pom coordinates changed accordingly
- mpc-webmvc-sse-transport -> mcp-spring-webmvc
 - pom coordinates changed accordingly
- docs contains the mdx version of the documentation

mcp-spring/mcp-spring-webmvc/README.md

@@ -0,0 +1,29 @@
+# WebMVC SSE Server Transport
+
+```xml
+<dependency>
+    <groupId>io.modelcontextprotocol.sdk</groupId>
+    <artifactId>mcp-spring-webmvc</artifactId>
+</dependency>
+```
+
+
+
+```java
+String MESSAGE_ENDPOINT = "/mcp/message";
+
+@Configuration
+@EnableWebMvc
+static class MyConfig {
+
+    @Bean
+    public WebMvcSseServerTransport webMvcSseServerTransport() {
+        return new WebMvcSseServerTransport(new ObjectMapper(), MESSAGE_ENDPOINT);
+    }
+
+    @Bean
+    public RouterFunction<ServerResponse> routerFunction(WebMvcSseServerTransport transport) {
+        return transport.getRouterFunction();
+    }
+}
+```