### Description Some properties in ChatCompletionRequestBuilder cannot be modified because are defined as `val` instead of `var`. https://github.com/aallam/openai-kotlin/blob/c56a3367d6ff8b99c0d89a52738e69578e3bcd33/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatCompletionRequest.kt#L216 https://github.com/aallam/openai-kotlin/blob/c56a3367d6ff8b99c0d89a52738e69578e3bcd33/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatCompletionRequest.kt#L248 https://github.com/aallam/openai-kotlin/blob/c56a3367d6ff8b99c0d89a52738e69578e3bcd33/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatCompletionRequest.kt#L261 ### Steps to Reproduce 1. Create a chat completion request and try to set `reasoningEffort`, `store` and `maxCompletionTokens` properties Example code: 