Support nonstandard config paths #42
Description
ZMK's build workflow allows customizing the config path and build matrix path. These values are currently hard coded in ZMK CLI. We should support changing those paths here too.
To avoid duplicate data, we could try to read from the GitHub workflow file, however that may not work if the user has replaced it with a custom workflow or is not using GitHub at all, so we may need to support something like a zmk.ini file in the root of the repo.
Related to zmkfirmware/zmk#3006