feat: Add LOCAL variable support for responses with UTF-8 JSON encoding.

Description: This feature adds support for UTF-8 encoding in JSON responses, allowing for proper handling of special characters and emojis.

- Implement unit tests for UTF-8 encoding in various model providers including Gemini, OpenAI, and OpenAI Compatible.
- Validate UTF-8 support in token counting, content generation, and error handling.
- Introduce tests for JSON serialization ensuring proper handling of French characters and emojis.
- Create tests for language instruction generation based on locale settings.
- Validate UTF-8 handling in workflow tools including AnalyzeTool, CodereviewTool, and DebugIssueTool.
- Ensure that all tests check for correct UTF-8 character preservation and proper JSON formatting.
- Add integration tests to verify the interaction between locale settings and model responses.

tests/test_collaboration.py

@@ -34,7 +34,8 @@ class TestDynamicContextRequests:
                 "status": "files_required_to_continue",
                 "mandatory_instructions": "I need to see the package.json file to understand dependencies",
                 "files_needed": ["package.json", "package-lock.json"],
-            }
+            },
+            ensure_ascii=False
         )
 
         mock_provider = create_mock_provider()
@@ -174,7 +175,8 @@ class TestDynamicContextRequests:
                         ],
                     },
                 },
-            }
+            },
+            ensure_ascii=False
         )
 
         mock_provider = create_mock_provider()
@@ -339,7 +341,8 @@ class TestCollaborationWorkflow:
                 "status": "files_required_to_continue",
                 "mandatory_instructions": "I need to see the package.json file to analyze npm dependencies",
                 "files_needed": ["package.json", "package-lock.json"],
-            }
+            },
+            ensure_ascii=False
         )
 
         mock_provider = create_mock_provider()
@@ -405,7 +408,8 @@ class TestCollaborationWorkflow:
                 "status": "files_required_to_continue",
                 "mandatory_instructions": "I need to see the configuration file to understand the connection settings",
                 "files_needed": ["config.py"],
-            }
+            },
+            ensure_ascii=False
         )
 
         mock_provider = create_mock_provider()