fix: set moduleResolution: Bundler in tsconfig.node.json

fix: set moduleResolution: Bundler in tsconfig.node.json

It was `moduleResolution: "node"` in `@tsconfig/node18` v2, but later
changed to `node16` in v18.
This is a breaking change, and not suitable for our use cases.

We use the Node.js tsconfig for configuration files, most of which
expect either `moduleResolution: "node"` or
`moduleResolution: "bundler"` (e.g. Vite, which has its own bundling
logic for configuration file).

So in the commit, I'm setting it to `moduleResolution: "bundler"`.
I haven't seen any regressions myself, but if there are any, we can
revert to `moduleResolution: "node"`.
`node16` is obviously not compatible with many tools at the moment.