Break apart common_types mod (#334)

Signed-off-by: José Ulises Niño Rivera <junr03@users.noreply.github.com>

crates/common/src/api/zero_shot.rs

@@ -0,0 +1,18 @@
+use std::collections::HashMap;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ZeroShotClassificationRequest {
+    pub input: String,
+    pub labels: Vec<String>,
+    pub model: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ZeroShotClassificationResponse {
+    pub predicted_class: String,
+    pub predicted_class_score: f64,
+    pub scores: HashMap<String, f64>,
+    pub model: String,
+}