error: failed to load manifest for workspace member `C:\Users\coltm\source\repos\Mainstage\core`
referenced by workspace at `C:\Users\coltm\source\repos\Mainstage\Cargo.toml`

Caused by:
  failed to parse manifest at `C:\Users\coltm\source\repos\Mainstage\core\Cargo.toml`

Caused by:
  no targets specified in the manifest
  either src/lib.rs, src/main.rs, a [lib] section, or [[bin]] section must be present
