feat: Widget.ScrollingLabel

[Bavalionprolate]

ScrollingLabel Class

The ScrollingLabel class is a widget for displaying text that automatically scrolls if its length exceeds a specified maximum. It inherits from the Label class and adds scrolling functionality with customizable parameters.

Key Features:

• Text Scrolling: If the text is too long, it will scroll at a specified speed.
• Maximum Text Length: You can specify the maximum length of the text before it starts scrolling.
• Scrolling Speed: You can set the speed of scrolling in milliseconds.
• CSS Class Support: CSS classes can be applied for styling.
• Text Alignment and Wrapping: Text alignment (e.g., left) and text wrapping can be configured.

Parameters:

• label: The text to be displayed.
• max_length: The maximum length of text before scrolling begins (default is 10 characters).
• scroll_speed: The speed of the scrolling (default is 500 milliseconds).
• css_classes: A list of CSS classes for styling.
• justify: The alignment of the text (default is 'left').
• wrap: Whether to wrap the text (default is True).
• wrap_mode: The text wrapping mode (default is 'word').

Important Methods:

• _get_display_text: Generates the current text for display, considering scrolling.
• _scroll_text: Updates the scrolling index and updates the displayed text.
• _start_scrolling: Starts a timer to scroll the text.
• _scroll_text_and_continue: Updates the text and continues scrolling.

This class is useful for displaying long strings of text, such as news feeds, announcements, etc., where dynamic scrolling of information is needed.

[linkfrg]

1. Use Google style of docstrings, dev docs
2. CSS classes will be applied by Label (BaseWidget) constructor, no need to repeat code
3. Do not describe label, wrap, justify properties, just indicate that "Bases: :class:~ignis.widgets.Widget.Label", this class will inherit them from Label anyway
4. use mypy and ruff

In general, please read the developer guide

[Bavalionprolate]

Okey, I apologize, I'll be sure to read it and send a pull request with corrections