Add CLI batch support for presenting warnings when pasting configs

Add CLI batch support for presenting warnings when pasting configs
Adds a new `batch` command used to delineate a group of commands as a related batch. The primary purpose is to group commands sent from the Configurator resulting from a copy/pasted config. Currently the output of the `diff all` command appends a `save` at the end of its output. So when a user pastes in their config to restore they may not see any errors because the `save` command causes the flight controller to reboot before they can review. When commands are wrapped inside of a batch, any errors will set a flag that will issue a warning when the `save` command is executed. This allows the user ro review and correct there configuration.