refactor: use project&stack types in core v1 pkg

[adohe]

What type of PR is this?

What this PR does / why we need it:

use project&stack types in core v1 pkg

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., design docs, usage docs, etc.:

[coveralls]

Pull Request Test Coverage Report for Build 7289298238

• 142 of 185 (76.76%) changed or added relevant lines in 16 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.05%) to 74.461%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/cmd/build/options.go	1	2	50.0%
pkg/cmd/build/util.go	7	8	87.5%
pkg/cmd/deps/options.go	3	4	75.0%
pkg/engine/runtime/terraform/terraform_runtime.go	2	3	66.67%
pkg/modules/generators/app_configurations_generator.go	0	1	0.0%
pkg/modules/generators/monitoring/monitoring_generator.go	3	4	75.0%
pkg/project/paths.go	105	142	73.94%

Totals
Change from base Build 7287470124:	-0.05%
Covered Lines:	7257
Relevant Lines:	9746

---

💛 - Coveralls