Refactor(kclvm-tools): move 'printer' from 'kclvm-tools' to 'kclvm-ast'.

[zong-zhe]

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

• N
• Y

issue #67

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

kclvm-tools
kclvm-ast

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

move 'printer' from 'kclvm-tools' to 'kclvm-ast'

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

[Peefy]

LGTM

[He1pa]

lgtm

[coveralls]

Pull Request Test Coverage Report for Build 3210438926

• 11 of 11 (100.0%) changed or added relevant lines in 2 files are covered.
• 500 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+1.008%) to 60.882%

---

Files with Coverage Reduction	New Missed Lines	%
kclvm/ast/src/token_stream.rs	1	75.0%
kclvm/sema/src/resolver/global.rs	15	61.42%
kclvm/sema/src/resolver/scope.rs	72	60.0%
kclvm/parser/src/parser/stmt.rs	127	88.87%
kclvm/parser/src/parser/expr.rs	285	81.58%

Totals
Change from base Build 3209496886:	1.008%
Covered Lines:	23230
Relevant Lines:	38156

---

💛 - Coveralls

[He1pa]

lgtm