updated authentication for embedding provider

crates/ai/src/auth.rs

@@ -0,0 +1,20 @@
+use gpui::AppContext;
+
+#[derive(Clone)]
+pub enum ProviderCredential {
+    Credentials { api_key: String },
+    NoCredentials,
+    NotNeeded,
+}
+
+pub trait CredentialProvider: Send + Sync {
+    fn retrieve_credentials(&self, cx: &AppContext) -> ProviderCredential;
+}
+
+#[derive(Clone)]
+pub struct NullCredentialProvider;
+impl CredentialProvider for NullCredentialProvider {
+    fn retrieve_credentials(&self, _cx: &AppContext) -> ProviderCredential {
+        ProviderCredential::NotNeeded
+    }
+}