feat: enhance API tool with body serialization and content type handling (#2192)

* feat: enhance API tool with body serialization and content type handling

* feat: enhance ToolConfig with import functionality and user action management

- Added ImportSpecModal to allow importing actions into the tool configuration.
- Implemented search functionality for user actions with expandable action details.
- Introduced method colors for better visual distinction of HTTP methods.
- Updated APIActionType and ParameterGroupType to include optional 'required' field.
- Refactored action rendering to improve usability and maintainability.

* feat: add base URL input to ImportSpecModal for action URL customization

* feat: update TestBaseAgentTools to include 'required' field for parameters

* feat: standardize API call timeout to DEFAULT_TIMEOUT constant

* feat: add import specification functionality and related translations for multiple languages

---------

Co-authored-by: Alex <a@tushynski.me>

tests/agents/test_base_agent.py

@@ -229,8 +229,14 @@ class TestBaseAgentTools:
                         "type": "string",
                         "description": "Test param",
                         "filled_by_llm": True,
+                        "required": True,
+                    },
+                    "param2": {
+                        "type": "number",
+                        "filled_by_llm": False,
+                        "value": 42,
+                        "required": False,
                     },
-                    "param2": {"type": "number", "filled_by_llm": False, "value": 42},
                 }
             }
         }