For #271167 This makes it so our built-in extensions can mostly be built using `tsc` on the command line. Previously the extensions were picking up a lot of typing info from the root `node_modules` that meant they weren't truly independent
I reviewed the various changes and library additions of es2024 and it seems they are widely supported across node and modern browsers
notebook-markdown-extension
markdown-math
This makes it more clear what this extension is contributing