feat: Add a function to parse all kcl files in the given path and opts

[He1pa]

Add a function to parse all kcl files in the given path and optss.
Different from load_program, this function will compile files that are not imported.

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

• N
• Y Preparing for#1546

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

kclvm/parser/src/lib.rs

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

Add a function to parse all kcl files in the given path and optss.
Different from load_program, this function will compile files that are not imported.

• 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

[coveralls]

Pull Request Test Coverage Report for Build 11812384342

Details

• 171 of 235 (72.77%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 70.722%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kclvm/parser/src/lib.rs	146	210	69.52%

Totals
Change from base Build 11789673643:	0.02%
Covered Lines:	52539
Relevant Lines:	74289

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💛 - Coveralls

[Peefy]

LGTM