CLI feels much slower than console when getting/setting config values

[wesbillman]

We recently hooked up get/set of config values from the console. They seem to happen almost instantly.

However, when doing the same from CLI there's a noticeable delay in each command.

ftl config set --inline echo.default "coolnewvalue"

[alecthomas]

If this is in the ftl repo itself it's because the ftl command triggers a rebuild. The slowness is the build.