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

docs/operations/content.mdx

@@ -0,0 +1,36 @@
+---
+title: "Content"
+---
+
+## Supported Types
+
+### `operations.ContentText`
+
+```python
+value: operations.ContentText = /* values here */
+```
+
+### `operations.ContentImageURL`
+
+```python
+value: operations.ContentImageURL = /* values here */
+```
+
+### `components.ContentPartInputAudio`
+
+```python
+value: components.ContentPartInputAudio = /* values here */
+```
+
+### `components.ContentPartInputVideo`
+
+```python
+value: components.ContentPartInputVideo = /* values here */
+```
+
+### `components.ContentPartInputFile`
+
+```python
+value: components.ContentPartInputFile = /* values here */
+```
+