Improve terraspace state comands and Terraspace.argv for internal usage

[tongueroo]

This is a 🙋‍♂️ feature or enhancement.
This is a 🧐 documentation change.

• I've added tests (if it's a bug, feature or enhancement)
• I've adjusted the documentation (if it's a feature or enhancement)
• The test suite passes (run bundle exec rspec to verify this)

Summary

• improve state command: delegate args straight through to underlying terraform commands
• improve args setting. leverage by rspec-terraspace for consistent checking
• improve help: can call help regardless of being a terraspace project no matter what

Context

boltops-tools/rspec-terraspace#5

How to Test

Sanity check that terraspace new project works.

Version Changes

Patch