fix: fix ast and lsp filename in windows os

[He1pa]

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

• N
• Y Language server compilation error and no syntax highlighting in vscode when code is valid on Windows #1251

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

kclvm/ast/src/ast.rs
kclvm/error/src/diagnostic.rs
kclvm/parser/src/lib.rs
kclvm/parser/src/parser/mod.rs
kclvm/tools/src/LSP/src/from_lsp.rs
kclvm/tools/src/util/loader.rs
kclvm/utils/src/path.rs

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

[coveralls]

Pull Request Test Coverage Report for Build 9016893742

Details

• 59 of 59 (100.0%) changed or added relevant lines in 7 files are covered.
• 9 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.02%) to 71.423%

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Files with Coverage Reduction	New Missed Lines	%
kclvm/ast/src/token.rs	1	58.22%
kclvm/ast/src/ast.rs	1	83.51%
kclvm/sema/src/core/symbol.rs	3	46.73%
kclvm/config/src/settings.rs	4	78.26%

Totals
Change from base Build 9001904993:	0.02%
Covered Lines:	53311
Relevant Lines:	74641

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💛 - Coveralls

[Peefy]

Good Job! LGTM!