Apply mdEngine to preview webview

[Vigilans]

Prerequisities

• Merge chore: modify the plugin source leetcode-tools/leetcode-cli#1
• Merge Add likes and dislikes property to problem description leetcode-tools/leetcode-cli#3
• Replace submissions and accepted with likes and dislikes in the info table
• Update the dependency

before merging this PR.

Demonstration

[Vigilans]

This line relates to (maybe) a bug in vscode, and I have reported in a issue:
microsoft/vscode#71608, which makes me have to create column 2 first before moving (by calling reveal(ViewColumn.Two)) the webview panel to it.

I've successfully build the vscode repository locally in the aftertoon, and I'd like to have a try to debug the vscode myself.

[Vigilans]

Each comma without variable before it means ignore this line (normally empty line, or something not needed)

[poppinlp]

Looks cool! 👍