Support kotlinx.serialization

Hi, Since Spring Framework 5.3 supports Kotlinx.serialization, I am actively using it in my project. ([Reference Link](https://docs.spring.io/spring-framework/docs/current/reference/html/languages.html#kotlin-multiplatform-serialization))

I tested it by applying Kotlinx.Serialization, but it didn't work.
```Kotlin
@Serializable
data class UserDto (
val id: Long,
val name: String,
val roleCode: String
)
```

```
"exception" : {
"name" : "java.lang.IllegalArgumentException",
"message" : "Non-serializable object",
"stackTrace" : {
"at" : [
"net.rubyeye.xmemcached.transcoders.BaseSerializingTranscoder.serialize(BaseSerializingTranscoder.java:93)",
"net.rubyeye.xmemcached.transcoders.SerializingTranscoder.encode(SerializingTranscoder.java:199)",
"net.rubyeye.xmemcached.command.text.TextStoreCommand.encodeValue(TextStoreCommand.java:185)",
"net.rubyeye.xmemcached.command.text.TextStoreCommand.encode(TextStoreCommand.java:145)",
"net.rubyeye.xmemcached.impl.MemcachedTCPSession.wrapMessage(MemcachedTCPSession.java:174)",
"com.google.code.yanf4j.core.impl.AbstractSession.write(AbstractSession.java:370)",
"net.rubyeye.xmemcached.impl.MemcachedConnector.send(MemcachedConnector.java:504)",
"net.rubyeye.xmemcached.XMemcachedClient.sendCommand(XMemcachedClient.java:318)",
"net.rubyeye.xmemcached.XMemcachedClient.sendStoreCommand(XMemcachedClient.java:2343)",
"net.rubyeye.xmemcached.XMemcachedClient.set(XMemcachedClient.java:1252)",
"net.rubyeye.xmemcached.XMemcachedClient.set(XMemcachedClient.java:1306)",
"net.rubyeye.xmemcached.XMemcachedClient.set(XMemcachedClient.java:1295)",
"io.sixhours.memcached.cache.XMemcachedClient.set(XMemcachedClient.java:61)",
"io.sixhours.memcached.cache.MemcachedCache.put(MemcachedCache.java:108)",
```

As a result of debugging, it was confirmed that SerializingTranscoder is the Default Transcoder of the module.

Is there any other way to apply Kotlin serialization? I would be grateful if you could guide me.
Please also check out review of Kotlin serialization support.

Start by reading SerializingTranscoder and BaseSerializingTranscoder, which appear in the reported stack trace, alongside the linked Spring Kotlin serialization reference. Determine how Kotlinx.serialization could be applied to XMemcached's default transcoder and verify storing and retrieving the shown UserDto; done means the non-serializable-object error is resolved.

Written by the indexing model from the issue text.