`maya` command now exit if execute on non maya.js project.
`maya` command now exit if execute on non maya.js project.

For safety against unintended file rewrite.

Below commands required maya.js project directory structure.
- cqc
- export
- generate (g)

if this commands execute on non maya.js project structure.
There is a possibility to perform a user of unintended file rewrite / create.

Ragg-/maya.js,Ragg-/rektia,Ragg-/rektia,Ragg-/rektia,Ragg-/maya.js