Some properties in ChatCompletionRequestBuilder cannot be modified

[Wirlie]

Description

Some properties in ChatCompletionRequestBuilder cannot be modified because are defined as val instead of var.

openai-kotlin/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatCompletionRequest.kt

Line 216 in c56a336

public val reasoningEffort: Effort? = null

openai-kotlin/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatCompletionRequest.kt

Line 248 in c56a336

public val store: Boolean? = null

openai-kotlin/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatCompletionRequest.kt

Line 261 in c56a336

public val maxCompletionTokens: Int? = null

Steps to Reproduce

1. Create a chat completion request and try to set reasoningEffort, store and maxCompletionTokens properties

Example code: