chore: import upstream snapshot with attribution

simple-mind-map/bin/createPluginsTypeFiles.js

@@ -0,0 +1,21 @@
+const { exec } = require('child_process')
+const fs = require('fs')
+
+const base = './src/plugins/'
+const list = fs.readdirSync(base)
+const files = []
+list.forEach(item => {
+  const stat = fs.statSync(base + item)
+  if (stat.isFile()) {
+    files.push(item)
+  }
+})
+const str = files
+  .map(item => {
+    return base + item
+  })
+  .join(' ')
+
+exec(
+  `tsc ${str} --declaration --allowJs --emitDeclarationOnly --outDir types/src/ --target es2017 --skipLibCheck `
+)