feat(plugin-shiki): add logLevel option

[coveralls]

Pull Request Test Coverage Report for Build 9287247849

Details

• 2 of 6 (33.33%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 56.586%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugins/markdown/plugin-shiki/src/node/resolveHighlight.ts	2	6	33.33%
<!--	Total:	2	6	33.33%	-->

Files with Coverage Reduction	New Missed Lines	%
plugins/markdown/plugin-shiki/src/node/resolveHighlight.ts	1	69.84%
<!--	Total:	1		-->

Totals
Change from base Build 9286705501:	-0.2%
Covered Lines:	1005
Relevant Lines:	1588

---

💛 - Coveralls

[Mister-Hope]

I actually want 3 different log levels as a new option:

• warn each lang one time (default)
• no warning
• provide file information about every unknown code blog. (default with --debug)

I am planning to implement it as logLevel: 'default' | 'silent' | 'detailed', but some suggestions about option and keyword naming would be appreciated.

[Mister-Hope]

Closed by https://github.com/vuepress/ecosystem/pull/182