Now filters.text allows messages starting with a /, not excluding bot commands, we need a fast and simpler way to stop those entering filters.text if you want to exclude them.

I propose to change filters.command to the following behavior:

• invoking filters.command will filter any messages with entity.type='bot_command. Basically a mirror of `filters.entity(['bot_command']) which we can just invoke this way)
• invoking filters.command(only_start=True) | filters.command(True) (name is open for discussion) filters any messages that start with a bot command.

this will allow for easily using filters.text & ~filters.command(true) to not get any command updates with your text filter.

Optionally we could make filters.command a data_filter and add the found commands to CallbackContextas thecontext.commands` (list). Although maybe that is outside this scope and then should also be added for commandhandler to add.