docs(api): use mintlify for API specs

docs/api-reference/tasks/delete.mdx

@@ -0,0 +1,7 @@
+---
+title: "Delete Task"
+api: "DELETE /api/v1/tasks/{id}"
+description: "delete background tasks."
+---
+
+Manage asynchronous tasks.

docs/api-reference/tasks/list.mdx

@@ -0,0 +1,7 @@
+---
+title: "List Task"
+api: "GET /api/v1/tasks"
+description: "list background tasks."
+---
+
+Manage asynchronous tasks.

docs/api-reference/tasks/retrieve.mdx

@@ -0,0 +1,7 @@
+---
+title: "Retrieve Task"
+api: "GET /api/v1/tasks/{id}"
+description: "retrieve background tasks."
+---
+
+Manage asynchronous tasks.