feat: add JSON detection utility for various formats

- Implemented a utility function `detectJsonInLine` to identify and parse JSON data from different formats including direct JSON, tool calls, tool results, embedded JSON, and code blocks.
- Introduced `JsonDetectionResult` interface to standardize the detection results.
- Added a new test results file to track the status of tests.

test-results/.last-run.json

@@ -0,0 +1,4 @@
+{
+  "status": "failed",
+  "failedTests": []
+}