docs: Mintlify MDX docs + docs.json; bump Speakeasy to 1.787.0 (#382)

docs/operations/createembeddingsresponse.mdx

@@ -0,0 +1,18 @@
+---
+title: "CreateEmbeddingsResponse"
+---
+
+## Supported Types
+
+### `operations.CreateEmbeddingsResponseBody`
+
+```python
+value: operations.CreateEmbeddingsResponseBody = /* values here */
+```
+
+### `str`
+
+```python
+value: str = /* values here */
+```
+