[ALERename] Add ability to specify new name inline

Currently `ALERename` command has no arguments and it prompts for a new name of a symbol as an interactive dialog pre-filled with an old name.

While it is a good idea to input a new name by editing the old one in some case (like fixing a typo), it is sometimes faster to just rename a symbol like `:ALERename ` inline without the necessity to press `Enter` and erase the old name.

Is it possible to add such a functionality?