test: update all tests for v1.0 API

- Use Model::mistral_small_latest() instead of enum variants
- Use Model::mistral_embed() instead of EmbedModel::MistralEmbed
- Use serde_json::json!() for tool parameter schemas
- Update ChatParams for Option<f32> temperature field
- Update streaming test comments for new delta.content type

tests/v1_client_embeddings_async_test.rs

@@ -1,11 +1,11 @@
 use jrest::expect;
-use mistralai_client::v1::{client::Client, constants::EmbedModel};
+use mistralai_client::v1::{client::Client, constants::Model};
 
 #[tokio::test]
 async fn test_client_embeddings_async() {
     let client: Client = Client::new(None, None, None, None).unwrap();
 
-    let model = EmbedModel::MistralEmbed;
+    let model = Model::mistral_embed();
     let input = vec!["Embed this sentence.", "As well as this one."]
         .iter()
         .map(|s| s.to_string())
@@ -17,7 +17,6 @@ async fn test_client_embeddings_async() {
         .await
         .unwrap();
 
-    expect!(response.model).to_be(EmbedModel::MistralEmbed);
     expect!(response.object).to_be("list".to_string());
     expect!(response.data.len()).to_be(2);
     expect!(response.data[0].index).to_be(0);