Feat: add 'kpm pull' to pull the kcl package from oci registry.

[zong-zhe]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

fix issue #54 and #42

2. What is the scope of this PR (e.g. component or file name):

kpm pull

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[coveralls]

Pull Request Test Coverage Report for Build 4893530701

• 0 of 56 (0.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.9%) to 37.373%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/cmd/cmd_run.go	0	11	0.0%
pkg/oci/oci.go	0	11	0.0%
pkg/cmd/cmd_pull.go	0	34	0.0%

Totals
Change from base Build 4889591537:	-0.9%
Covered Lines:	626
Relevant Lines:	1675

---

💛 - Coveralls

[Peefy]

LGTM