feat: add dump and dumps methods to Graph (#3202)

* feat(utils.py): add escape_json_dump function to escape JSON strings for Edge dictionaries

* refactor(Output): streamline add_types method to prevent duplicate entries in types list for improved type management

* feat(data.py): add classmethod decorator to validate_data for enhanced validation logic when checking data types

* feat(setup.py): implement retry logic for loading starter projects to enhance robustness against JSON decode errors

* fix(input_mixin.py): improve model_config formatting and update field_type alias for clarity and consistency in field definitions

* feat(types.py): refactor vertex constructors to use NodeData and add input/output methods for better component interaction

* feat(schema.py): add NodeData and Position TypedDicts for improved type safety and structure in vertex data handling

* feat(base.py): update Vertex to use NodeData type and add to_data method for better data management and access

* refactor(schema.py): update TargetHandle and SourceHandle models to include model_config attribute

* Add TypedDict classes for graph schema serialization in `schema.py`

* Refactor `Edge` class to improve handle validation and data handling

- Consolidated imports and removed redundant `BaseModel` definitions for `SourceHandle` and `TargetHandle`.
- Added `valid_handles`, `target_param`, and `_target_handle` attributes to `Edge` class.
- Enhanced handle validation logic to distinguish between dictionary and string types.
- Introduced `to_data` method to return edge data.
- Updated attribute names to follow consistent naming conventions (`base_classes`, `input_types`, `field_name`).

* Refactor `Edge` class to improve handle validation and data handling

* Refactor: Standardize attribute naming and add `to_data` method in Edge class

- Renamed attributes to use snake_case consistently (`baseClasses` to `base_classes`, `inputTypes` to `input_types`, `fieldName` to `field_name`).
- Added `to_data` method to return `_data` attribute.
- Updated validation methods to use new attribute names.

* Refactor: Update Edge class to consistently use snake_case for attributes and improve validation logic for handles

* Refactor: Change node argument type in add_node and _create_vertex methods to NodeData for better type safety and clarity

* Refactor: Implement JSON serialization for graph data with `dumps` and `dump` methods, enhancing data export capabilities

* Refactor: Add pytest fixtures for ingestion and RAG graphs, enhance test structure for better clarity and organization

* Refactor: Add pytest fixtures for memory_chatbot_graph tests and improve test structure

* Refactor: Remove unused methods in ComponentVertex class to streamline code and improve readability

* Refactor: Remove unnecessary line in ComponentVertex class to enhance code clarity and maintainability

* Refactor: Update import path for DefaultPromptField to improve code organization and maintainability in api_utils.py

* Refactor: Update import path for DefaultPromptField to enhance code organization and maintainability in prompt.py

* fix: Remove  fixture in test_memory_chatbot.py that blocked db setup

* Refactor: Add durations path for unit tests to improve test reporting

* Refactor: Add splitting algorithm option for unit tests

* Add async option to Makefile for unit tests and update GitHub Actions workflow

- Introduced `async` variable in Makefile to conditionally run unit tests with or without parallel execution.
- Updated `unit_tests` target in Makefile to handle `async` flag.
- Modified GitHub Actions workflow to set `async=false` for unit tests.