Add experimental mcpClient(...) factory method (#396)

- Introduced `@ExperimentalMcpApi` annotation to mark experimental APIs.
- Added `mcpClient` function for initializing and connecting MCP
clients.
- Modified tests to utilize the new `mcpClient` function.
- Refactored variable naming in transport tests for improved
readability.

## Motivation and Context
To improve the creation of the MCP Client experience.

## How Has This Been Tested?
Integration test updated

## Breaking Changes
No

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

kotlin-sdk-client/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/client/Client.kt

@@ -1,6 +1,7 @@
 package io.modelcontextprotocol.kotlin.sdk.client
 
 import io.github.oshai.kotlinlogging.KotlinLogging
+import io.modelcontextprotocol.kotlin.sdk.ExperimentalMcpApi
 import io.modelcontextprotocol.kotlin.sdk.shared.Protocol
 import io.modelcontextprotocol.kotlin.sdk.shared.ProtocolOptions
 import io.modelcontextprotocol.kotlin.sdk.shared.RequestOptions
@@ -69,6 +70,30 @@ public class ClientOptions(
     enforceStrictCapabilities: Boolean = true,
 ) : ProtocolOptions(enforceStrictCapabilities = enforceStrictCapabilities)
 
+/**
+ * Initializes and connects an MCP client using the provided clientInfo [Implementation], client options,
+ * and transport mechanism.
+ *
+ * @param clientInfo The implementation details of the MCP client, including its name, version, and other metadata.
+ * @param clientOptions Optional client configuration settings, such as supported capabilities
+ *      and strict enforcement options. Defaults to a new instance of [ClientOptions].
+ * @param transport The transport mechanism used for communication.
+ * @return An instance of [Client] that is connected and ready for use with the specified transport.
+ */
+@ExperimentalMcpApi
+public suspend fun mcpClient(
+    clientInfo: Implementation,
+    clientOptions: ClientOptions = ClientOptions(),
+    transport: Transport,
+): Client {
+    val client = Client(
+        clientInfo = clientInfo,
+        options = clientOptions,
+    )
+    client.connect(transport)
+    return client
+}
+
 /**
  * An MCP client on top of a pluggable transport.
  *