Pygubu

* New UI Layout. Removed code generation Tab.
* New project settings dialog.
* Cleaned designer settings dialog.

* Update to support customtkinter 5.2.2

* Customize open file dialog on Gnu/Linux.
* New format for ttk style definition file. alejandroautalan/pygubu-designer204, alejandroautalan/pygubu-designer211
* New settings to auto generate code in Code Tab. (BloodyRain2k)
* Fix scrolling in toolbar frame (BloodyRain2k)
* New option to render widget palette as a single section widget toolbar.
Changes the widget toolbar to contain all chosen widgets instead of grouping them with tabs.
Useful for wide monitors. (BloodyRain2k)
* Type hints for tk variables in code generation. (BloodyRain2k)
* Add template code to center window at start. (BloodyRain2k)
* New Vietnamese translation for README.md (lebao3105)
* Update Chinese Translation (littlewhitecloud)

* Add option to auto generate code when code template is changed. refs alejandroautalan/pygubu-designer208
* Fix event names, refs alejandroautalan/pygubu-designer197
* Changed template code to call ttk styles on first object created. refs alejandroautalan/pygubu282

* New theming module. Adds bootstrap like themes, based on ttkbootstrap. Initial draft. TODO: improve graphics, draw with pillow if available.
* Modified ApplicationLevelBindManager, methods are now class methods and not static methods.
Added parameter master to the init_mousewheel_binding method.
* Modified UI definition. Added project options section.
Options saved: general options, code generation options, style definition, custom widgets.
* New widgets:
- New Hideable Frame widget.
- New PathChooserButton widget.
- New ColorInput widget.
- New docking widgets: DockFrame, DockWidget, DockPane. In alpha status, although pygubu designer uses them.
- New form widgets in alpha status.
- Expose accordion widget hidden in pygubu code (Maybe it will be useful).
* New emit_close_event for pygubu Dialog
* Grid container options, fixed bug: process "all" index first, so specific row/col props are configured correctly.
* New classmethods in Builder object canbe_parent_of, canbe_child_of.
* Added copy_custom_property function
* Added "public" argument to function register_widget
* Added new method Builder.add_resource_paths(path_list: list)

* Add missing container layout options for ScrolledFrame widget. Fixes alejandroautalan/pygubu293