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

docs/operations/zdr.mdx

@@ -0,0 +1,17 @@
+---
+title: "Zdr"
+---
+
+When set to "true", return only models with zero data retention endpoints.
+
+## Example Usage
+
+```python
+from openrouter.operations import Zdr
+value: Zdr = "true"
+```
+
+
+## Values
+
+- `"true"`