[Feature Request] onWillParseMarkdown does not support "require"

[Luca-wj]

When altering the content displayed by changing the Markdown using onWillParseMarkdown in parser.js, it is not possible to use require to load libraries, leading to significant limitations

({
  onWillParseMarkdown: async function(markdown) {
    try {
      const path = await require('path')
      return markdown  
    } catch (error) {
      return error + markdown  
    } 
  }
})

When using require, an error occurs
”ReferenceError: require is not defined“
This is because the Function interpretJS in utility.ts uses vm.runInNewContext, and require is not a global function. Therefore, it is recommended to provide users with a way to edit the context, allowing them to set up their own sandbox environment.
Here's an example: parser.js

({
    "require": require
})
,
({
    "onWillParseMarkdown": async function(markdown) {
    try {
      const path = await require('path')
      return markdown + path.join('a', 'b');
    } catch (error) {
      return error + markdown  
    } 
  }
})

The modified interpretJS

function interpretJS(text) {
    const [contextText, code] = splitObject(text);
    const context = eval(`(${contextText})`);
    vm.runInNewContext(`result = (${code})`, context);
    return context['result'];
  
  }
// split text of Object 
function splitObject(text) {
  let objectList = [];
  let braceDict = {'(': 0, ')': 0};
  let start = null;
  for (let i = 0; i < text.length; i++) {
    
    switch (text[i]) {
        case '(':
            braceDict['('] += 1
            if (start === null) {start = i;}
            break;
        case ')':
            braceDict[')'] += 1
            if (braceDict['('] === braceDict[')']) {
                objectList.push(text.slice(start, i + 1));
                start = null;
            }
            break;
        default:
    }
  }
  return objectList;
}

This allows adding parameters or global variables to the sandbox environment.