feat(chat)!: change safe_prompt, temperature & top_p to non-Option types

BREAKING CHANGE:
- `Chat::ChatParams.safe_prompt` & `Chat::ChatRequest.safe_prompt` are now `bool` instead of `Option<bool>`. Default is `false`.
- `Chat::ChatParams.temperature` & `Chat::ChatRequest.temperature` are now `f32` instead of `Option<f32>`. Default is `0.7`.
- `Chat::ChatParams.top_p` & `Chat::ChatRequest.top_p` are now `f32` instead of `Option<f32>`. Default is `1.0`.

src/v1/tool.rs

@@ -115,12 +115,16 @@ pub enum ToolType {
     Function,
 }
 
+/// An enum representing how functions should be called.
 #[derive(Clone, Debug, Eq, PartialEq, Deserialize, Serialize)]
 pub enum ToolChoice {
+    /// The model is forced to call a function.
     #[serde(rename = "any")]
     Any,
+    /// The model can choose to either generate a message or call a function.
     #[serde(rename = "auto")]
     Auto,
+    /// The model won't call a function and will generate a message instead.
     #[serde(rename = "none")]
     None,
 }