feat(data_hierarchy): implement changes for data type row

For "Data type" row: Modified to include a combo-box (listing all doc type labels), Add, Edit and Delete buttons
Add functionality
- Should show the existing form with following entries:
  - Data type (LineEdit)
  - Title (LineEdit)
  - IRI (LineEdit)
  - Shortcut key combination (LineEdit)
  - Icon (LineEdit or drop-down for the list of icons?)
- Removed "is structural type" checkbox from the form
- Edit functionality
- Edit form is an extension of add form, except for the data type entry which is read only. Also for "structure level type", icon and shortcut entries are read only items
- Delete functionality
  - Similar as before, should be disabled for structural items
- Structure level 0 & Structure level 1 are only supported, delete functionality should be disabled for both. Edit form for "structure level type" displays icon and shortcut as read only items

Summary by Sourcery

Refactor the data hierarchy editor to separate the creation and editing of data types into distinct dialogs, enhancing the user interface and validation. Introduce a singleton class for managing QTA icons and add comprehensive tests for the new features.

New Features:

Introduce a new dialog for editing existing data types, allowing users to modify attributes like IRI, title, shortcut, and icon.
Add a new dialog for creating data types with fields for data type, title, IRI, shortcut, and icon.
Implement a singleton class for managing QTA icons, ensuring only one instance is used throughout the application.

Enhancements:

Refactor the data hierarchy editor to separate the creation and editing of data types into distinct dialogs.
Improve the user interface by adding tooltips and disabling certain fields when editing existing data types.
Enhance the validation of data type information using a dedicated validator class.

Tests:

Add comprehensive unit tests for the new create and edit type dialogs, covering various scenarios and edge cases.
Introduce tests for the QTAIconsSingleton class to ensure correct initialization and icon management.
Implement tests for the DataTypeInfo and its validator to verify correct behavior and error handling.

Additional Info: Pyside6 version has been fixed to 6.7.3 since there is some incompatibility between the dependent libraries with the latest PySide6 6.8.0, The issue is already backlogged: PASTA APP crashes with segmentation fault

Reviewer's Guide by Sourcery

This pull request implements significant changes to the data hierarchy editor dialog in the PASTA-ELN application. The changes focus on improving the functionality for creating and editing data types, enhancing the user interface, and refactoring the codebase for better maintainability.

User journey diagram for data type row changes

journey
    title User journey for data type row changes
    section Data Type Row
      User selects data type from combo-box: 5: User
      User clicks Add button: 5: User
      System displays form with data type, title, IRI, shortcut, icon: 5: System
      User fills form and submits: 5: User
      System saves new data type: 5: System
      User clicks Edit button: 5: User
      System displays form with read-only data type, icon, shortcut: 5: System
      User modifies title and IRI: 5: User
      System saves changes: 5: System
      User clicks Delete button: 5: User
      System checks if data type is structural: 5: System
      System disables delete for structural types: 5: System

File-Level Changes

Change	Details	Files
Refactored and enhanced the data hierarchy editor dialog	Replaced CreateTypeDialog with a more generic TypeDialog class Implemented EditTypeDialog for editing existing data types Updated UI elements and callbacks in DataHierarchyEditorDialog Modified the data structure for storing data hierarchy types Improved error handling and user feedback	`pasta_eln/GUI/data_hierarchy/data_hierarchy_editor_dialog.py` `pasta_eln/GUI/data_hierarchy/data_hierarchy_editor_dialog_base.py` `tests/unit_tests/test_data_hierarchy_editor_dialog.py`
Introduced new classes for managing data types and icons	Created DataTypeInfo class to represent data type information Implemented DataTypeInfoValidator for validating DataTypeInfo instances Added QTAIconsSingleton for managing icon collections Created EditTypeDialog for editing existing data types	`pasta_eln/dataverse/data_type_info.py` `pasta_eln/dataverse/data_type_info_validator.py` `pasta_eln/GUI/data_hierarchy/qtaicons_singleton.py` `pasta_eln/GUI/data_hierarchy/edit_type_dialog.py`
Updated utility functions and data structures	Modified can_delete_type function to handle structural levels differently Updated generate_data_hierarchy_type function to use DataTypeInfo Removed get_next_possible_structural_level_title function Modified the structure of data hierarchy types in fixedStringsJson.py	`pasta_eln/GUI/data_hierarchy/utility_functions.py` `pasta_eln/fixedStringsJson.py`
Expanded and updated test suite	Added new test files for DataTypeInfo, DataTypeInfoValidator, and QTAIconsSingleton Updated existing tests to reflect changes in the data hierarchy editor dialog Modified test fixtures and mocks to accommodate new class structures	`tests/unit_tests/test_data_hierarchy_create_type_dialog.py` `tests/unit_tests/test_data_hierarchy_edit_type_dialog.py` `tests/unit_tests/test_data_hierarchy_type_dialog.py` `tests/unit_tests/test_data_hierarchy_icon_names.py` `tests/unit_tests/test_data_hierarchy_data_type_info.py` `tests/unit_tests/test_data_hierarchy_data_type_info_validator.py`

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PASTA-ELN / pasta-eln