feat(McpAsyncServer): Add non-blocking execution for tools and resources

- Execute tool calls, resource reads and prompt handling in a non-blocking
  manner using Schedulers.boundedElastic(). This prevents blocking operations
  from impacting server responsiveness.
- Added integration tests to verify non-blocking behavior with tools that
  make HTTP calls to external services.

Related to #48
This is  a temp patch until #48 is resolved properly.

mcp-docs/src/main/antora/modules/ROOT/pages/mcp.adoc

@@ -25,7 +25,7 @@ Add the following dependency to your Maven project:
 <dependency>
     <groupId>org.springframework.experimental</groupId>
     <artifactId>mcp</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.5.0-SNAPSHOT</version>
 </dependency>
 ----
 

mcp-docs/src/main/antora/modules/ROOT/pages/overview.adoc

@@ -40,7 +40,7 @@ Maven::
 <dependency>
     <groupId>org.springframework.experimental</groupId>
     <artifactId>mcp</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.5.0-SNAPSHOT</version>
 </dependency>
 ----
 +
@@ -50,7 +50,7 @@ Maven::
 <dependency>
     <groupId>org.springframework.experimental</groupId>
     <artifactId>spring-ai-mcp</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.5.0-SNAPSHOT</version>
 </dependency>
 ----
 +

mcp-docs/src/main/antora/modules/ROOT/pages/spring-mcp.adoc

@@ -36,6 +36,6 @@ To use this module, add the following dependency to your Maven project:
 <dependency>
     <groupId>org.springframework.experimental</groupId>
     <artifactId>spring-ai-mcp</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.5.0-SNAPSHOT</version>
 </dependency>
 ----