refactor: merge pkg operation/models to operation/types

[howieyuen]

Pkg operation has two sub pkg, models and types, they are written for same usages, so merge them to one pkg.

For avoiding import path collision, takes types as the final choice.

This PR changes 20+ files, mostly changes are import path and format.

[coveralls]

Pull Request Test Coverage Report for Build 3739387346

• 32 of 45 (71.11%) changed or added relevant lines in 12 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.4%) to 72.547%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/engine/operation/models/operation_context.go	0	3	0.0%
pkg/kusionctl/cmd/apply/options.go	4	7	57.14%
pkg/engine/operation/graph/resource_node.go	8	15	53.33%

Totals
Change from base Build 3701897865:	0.4%
Covered Lines:	4614
Relevant Lines:	6360

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💛 - Coveralls

[SparkYuan]

models and types are deliberately designed as two pkgs to follow the old driver's advice.... More details can be found here.

#57 (comment)

[howieyuen]

models and types are deliberately designed as two pkgs to follow the old driver's advice.... More details can be found here.

#57 (comment)

Yeah, I read this comment, but still confused about the differences between package models and types.

First, pkg/engine/operation/types has two Definition:

• ActionType, one of ChangeStep's fields, it's for marking ChangeStep kind, can be Create/Update/Unchanged/Delete
• OperationType, one of Operation's fields, it's for marking Operation's kind, can be Apply/ApplyPreview/Destroy/DestroyPreview

why split them into 2 packages?

[howieyuen]

for better understanding, merge into pkg/engine/operation/models