feat!: add client.embeddings() method

BREAKING CHANGE: Models are now enforced by `Model` & `EmbedModel` enums.

src/v1/embedding.rs

@@ -0,0 +1,60 @@
+use serde::{Deserialize, Serialize};
+
+use crate::v1::{common, constants};
+
+#[derive(Debug)]
+pub struct EmbeddingRequestOptions {
+    pub encoding_format: Option<EmbeddingRequestEncodingFormat>,
+}
+impl Default for EmbeddingRequestOptions {
+    fn default() -> Self {
+        Self {
+            encoding_format: None,
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct EmbeddingRequest {
+    pub model: constants::EmbedModel,
+    pub input: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub encoding_format: Option<EmbeddingRequestEncodingFormat>,
+}
+impl EmbeddingRequest {
+    pub fn new(
+        model: constants::EmbedModel,
+        input: Vec<String>,
+        options: Option<EmbeddingRequestOptions>,
+    ) -> Self {
+        let EmbeddingRequestOptions { encoding_format } = options.unwrap_or_default();
+
+        Self {
+            model,
+            input,
+            encoding_format,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq, Deserialize, Serialize)]
+#[allow(non_camel_case_types)]
+pub enum EmbeddingRequestEncodingFormat {
+    float,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct EmbeddingResponse {
+    pub id: String,
+    pub object: String,
+    pub model: constants::EmbedModel,
+    pub data: Vec<EmbeddingResponseDataItem>,
+    pub usage: common::ResponseUsage,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct EmbeddingResponseDataItem {
+    pub index: u32,
+    pub embedding: Vec<f32>,
+    pub object: String,
+}