What kind of feature are you missing? Where do you notice a shortcoming of PTB?

The discussion with TG intdlib/telegram-bot-api#515 has made it clear that we should encourage users to work more with MessageEntities rather than with ourtext_html/markdown helpers. Since this is sometimes cumbersome, convenience functionality for working with ME is surely advisable and we've made a step into that direction with#4323 .

What I'd like to see in addition is convenience functionality for catenating text with entities as initially touched intdlib/telegram-bot-api#515 (comment)

Describe the solution you'd like

new class methods

• ME.shift_entities(entities: Sequence[ME], by: str | int) -> Sequence[ME]: shifts the entities by the specified length or the utf-16 length of the string ofby is a string. This would be useful for adding a prefix to a message with entities
• ME.concatetane(first: tuple[str, Sequence[ME]], second: tuple[str, Sequence[ME]]) -> tuple[str, Sequence[ME]]: Concatenates text and entities. UsesME.shift_entities internally

Describe alternatives you've considered

ME.concatenate could be skipped in a first step as it can be implemented usingshift_entities

Additional context

No response