[Bug] pprint_run_response TypeError on streaming dict content

Description

pprint_run_response concatenates streaming resp.content onto a string. Structured-output chunks that are dicts (or other non-strings) raise TypeError. The non-streaming path already JSON-encodes non-string content.

Steps to Reproduce

from agno.run.agent import RunContentEvent
from agno.utils.pprint import pprint_run_response

pprint_run_response([RunContentEvent(content={"city": "Paris"})])

Expected Behavior

The dict is printed as JSON, matching the non-streaming path. No exception.

Actual Behavior

TypeError: can only concatenate str (not "dict") to str

Environment

• OS: Windows 11
• Agno Version: v3.0.10 (current main)
• Additional Environment Details: Python 3.13

Possible Solutions (optional)

Stringify non-str chunks with json.dumps before concatenating. Apply the same in apprint_run_response.