enhance: build word index prune word in comments

[amyXia1994]

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

• N
• Y

fix #894

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

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

enhance: build word index prune word in comments

• 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 6957187330

Warning: This coverage report may be inaccurate.

We've detected an issue with your CI configuration that might affect the accuracy of this pull request's coverage report.
To ensure accuracy in future PRs, please see these guidelines.
A quick fix for this PR: rebase it; your next report should be accurate.

• 124 of 125 (99.2%) changed or added relevant lines in 6 files are covered.
• 471 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-16.1%) to 71.716%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kclvm/tools/src/LSP/src/state.rs	2	3	66.67%

Files with Coverage Reduction	New Missed Lines	%
compiler_base/error/src/diagnostic/components.rs	6	0.0%
compiler_base/error/src/errors.rs	8	0.0%
compiler_base/session/src/lib.rs	26	58.06%
compiler_base/error/src/diagnostic/mod.rs	27	0.0%
compiler_base/error/src/diagnostic/style.rs	41	0.0%
compiler_base/error/src/diagnostic/diagnostic_message.rs	74	0.0%
compiler_base/error/src/emitter.rs	119	0.0%
compiler_base/error/src/diagnostic/diagnostic_handler.rs	170	0.0%

Totals
Change from base Build 6953489903:	-16.1%
Covered Lines:	41706
Relevant Lines:	58154

---

💛 - Coveralls

[Peefy]

LGTM