Add user-agent to kotlin

Author: everly-gif

templates/kotlin/src/main/kotlin/io/appwrite/Client.kt.twig

@@ -62,8 +62,7 @@ class Client @JvmOverloads constructor(
     init {
         headers = mutableMapOf(
             "content-type" to "application/json",
-            "origin" to "{{ spec.title | caseLower }}-kotlin://${context.packageName}",
-            "user-agent" to "${context.packageName}/${appVersion}, ${System.getProperty("http.agent")}",
+            "user-agent" to "{{spec.title | caseUcfirst}}Kotlin/{{ sdk.version }} (${os.type()} ${os.version()}; ${os.arch()})",
             "x-sdk-version" to "{{spec.title | caseDash}}:{{ language.name | caseLower }}:${BuildConfig.SDK_VERSION}"{% if spec.global.defaultHeaders | length > 0 %},{% endif %}