feat: #228 popover attribute typings

[thescientist13]

Related Issue

resolves #228

Summary of Changes

1. Add custom typings for popovertarget and popovertargetaction
2. Add DOM lib recommendation to TSX setup

TODO

1. Should we refine this to just button and input, per Move popovertarget and popovertargetaction data from global_attibutes to <button> and <input> mdn/browser-compat-data#21875 ? - narrow popover related attribute types to just <button> and <input> elements #236
2. Do we even need the override at all? - narrow popover related attribute types to just <button> and <input> elements #236