Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and discussions and couldn’t find anything (or linked relevant results below)

Problem

When developing remark plugins, I make the language server crash from time-to-time.
Also, it doesn't always seem to reload my config when I want.

I'd like to have a vscode command, similar to the typescript language server, where I can forcefully reload the remark plugin without having to reload vscode or the plugin.

Current solutions

ctrl+shift+p > Developer: Reload window

However, this destroys any open terminals or debugging windows.

Proposed solutions

Have a similar command to the typescript language server, that reloads the language server.

• https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/src/commands/restartTsServer.ts
• https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/src/typescriptServiceClient.ts#L319
• https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/package.json#L1570
• https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/package.nls.json#L61
• They have this whole command manager
  https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/src/commands/index.ts#L22
  I think just using the vscode.commands.registerCommand approach is good enough.