Style dropdown: Support for universal selector * to apply classes to any element

[lisapower123]

Currently, the style dropdown in CKEditor only allows applying a style class to predefined element types (e.g., p, h2, a). If you want to use the same style for both block-level and inline elements, you need to create separate definitions for each element type.

Proposal:
Extend the style definitions to allow using the universal selector "*" so that a class can be applied regardless of the current element type, whether it's p, h2, span, a or any other.

Example:
{
"name": "Small text",
"element": "*",
"classes": [ "small-text" ]
}

Benefits:

• Unified style definitions for different element types.
• Fewer redundant style entries in the dropdown.
• Greater flexibility for editors without forcing additional wrappers.
• Cleaner HTML output by reusing existing elements instead of inserting new ones.