Clean up command outputs

Our commands print too much:

• Many redundant newlines. This is problematic because useful information quickly leaks out of the viewport.
• Redundant content. For example, the message about database setup wastes 5 lines.

Read this for extra context (mandatory):

• https://github.com/wasp-lang/wasp/issues/188

Subissues for specific commands:

• #1081 (Clean up the output of wasp start)