Helper text for `flow emulator start` is confusing if command is accidentally run from the wrong directory

[briandoyle81]

Instructions

Please fill out the template below to the best of your ability.

Issue To Be Solved

If flow emulator start is run in a directory that does not contain either emulator-account.pkey or flow.json (I'm not sure which, or both), you receive the following message, suggesting there are further steps to run the emulator:

🙏 Configuration is missing, initialize it with: 'flow init' and then rerun this command.

Following these instructions creates a new project in the current directory, which feels unexpected.

(Optional): Suggest A Solution

Recommend updating the helper text to:

🙏 Configuration (flow.json) is missing, are you in the correct directory?  If you are trying to create a new project, initialize it with `flow init` and then rerun this command.