feat: add API key management and tag discovery functionality with corresponding schemas and routes

thoughts-backend/doc/src/api_key.rs

@@ -0,0 +1,16 @@
+use api::{models::ApiErrorResponse, routers::api_key::*};
+use models::schemas::api_key::{ApiKeyListSchema, ApiKeyRequest, ApiKeyResponse, ApiKeySchema};
+use utoipa::OpenApi;
+
+#[derive(OpenApi)]
+#[openapi(
+    paths(get_keys, create_key, delete_key),
+    components(schemas(
+        ApiKeySchema,
+        ApiKeyListSchema,
+        ApiKeyRequest,
+        ApiKeyResponse,
+        ApiErrorResponse,
+    ))
+)]
+pub(super) struct ApiKeyApi;