Move tsup configuration to use experimentalDts or use rollup

[ixahmedxi]

Currently, the build time for the ui package is very slow because of DTS generation of many entry points, this is a known issue with tsup and the way around it is to just increase the memory that it can use which is not great.

The options we have to tackle this are:

• move to the new experimentalDts feature, note that I have tried this and it ended up giving me a lot of TS errors.
• create our own custom packages/config/rollup where we define all bundling needs in the monorepo there.