feat: add kusion mod login and pull sub-command

[liu-hm19]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This PR implements the kusion mod login and kusion mod pull sub-command for Kusion CLI to login and pull kusion modules declared in kcl.mod file from a private oci registry.

Which issue(s) this PR fixes:

Fixes #1255

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 12478820744

Details

• 0 of 161 (0.0%) changed or added relevant lines in 5 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.4%) to 47.988%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/cmd/mod/mod.go	0	2	0.0%
pkg/cmd/generate/generate.go	0	5	0.0%
pkg/engine/api/generate/run/run.go	0	5	0.0%
pkg/cmd/mod/login.go	0	65	0.0%
pkg/cmd/mod/pull.go	0	84	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/engine/operation/parser/parser.go	3	79.27%

Totals
Change from base Build 12476129308:	-0.4%
Covered Lines:	10542
Relevant Lines:	21968

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💛 - Coveralls