perf: improve shiki twoslash options

[pengzhanbo]

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Provide a description in this PR that addresses what the PR is solving. If this PR is going to solve an existing issue, please reference the issue (e.g. close #123).

What is the purpose of this pull request?

• Bug fix
• New feature
• Other

Description

Screenshots

Before

After

[netlify]

❌ Deploy Preview for vuepress-ecosystem failed. Why did it fail? →

Name	Link
🔨 Latest commit	b6e3c4c
🔍 Latest deploy log	https://app.netlify.com/sites/vuepress-ecosystem/deploys/67aa0d0d88611900082b352f

[coveralls]

Pull Request Test Coverage Report for Build 13259994264

Details

• 3 of 4 (75.0%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 59.628%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugins/markdown/plugin-shiki/src/node/markdown/highlighter/createShikiHighlighter.ts	3	4	75.0%

Files with Coverage Reduction	New Missed Lines	%
plugins/markdown/plugin-shiki/src/node/markdown/highlighter/createShikiHighlighter.ts	3	69.05%

Totals
Change from base Build 13239558436:	-0.03%
Covered Lines:	1348
Relevant Lines:	2043

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💛 - Coveralls