[TR #67] Create function to add save configuration
Creates edu.unc.applab.clem-repl.config/save-config! which takes a key and value and saves them to a config file.
This commit has no tests, because it is stateful and modifies the filesystem.
Creates edu.unc.applab.clem-repl.config/save-config! which takes a key and value and saves them to a config file.
This commit has no tests, because it is stateful and modifies the filesystem.