Add ability to call run [command] from subdirectory and have turbo build necessary targets up to desired target and then run the target

[jaredpalmer]

Describe the feature you'd like to request

• cd app && turbo dev should build whatever is necessary

Describe the solution you'd like

• We may need to have a way to mark the "root" folder
• This also sets us up for esy-like environment variables and install commands, which we likely should be doing anyway.

Describe alternatives you've considered

• Running everything from the root is painful. Turbo should fix this.

[lfades]

To keep it zero config could it be possible to read the package.json of parent folders looking for the turbo key? I'm not sure of what would be the downsides in this case but it should be fast enough if it doesn't have to read far up the tree, and turbo could then cache the position of the root

[jaredpalmer]

Definite possibility. This will also be made easier when we move to #217 #218

[anthonyshew]

Install turbo globally. :)