Support both `<id> command` and `command <id>`

### Support both command id orders
Currently BusyList only supports the ` command` pattern, but many people have suggested `command `. We should support both ways.

### Describe how this new feature adds value to the application
It allows the user to use whatever command pattern they feel is more intuitive.

### Describe suggested implementation
For each command, support both patterns in the `CommandGrammar` class.

This is pretty much the easiest change to the parsing grammar possible, so I think it would be an excellent issue for someone who wants to get more familiar with parsing and Sprache.

### Additional context