[Feature request] add @vuepress/plugin-markdown-chart

[Mister-Hope]

Clear and concise description of the problem

Easily insert charts in markdown

Suggested solution

Support:

• chart.js
• Echarts
• flowchart.ts
• mermaid
• plantuml

Alternative

Split them into multiple plugins.

Additional context

No response

[Mister-Hope]

I am still vacillating between combining them and splitting them. Any ideas?

@pengzhanbo @meteorlxy

Also we need to implement a darkmode state guideline first in https://github.com/vuepress/ecosystem/pull/139

[github-actions[bot]]

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