svelte.config.js configuration allowing easy import of most modules

[trenta3]

I like SvelteKit a lot but in trying to use it with other packages I always stumble upon import errors that I don't know how to solve, and even searching on the web for them gives ideas for possible solutions (like using rollup plugins) that however don't work.
The most common errors I couldn't solve are (1) module is undefined (2) require is undefined (3) process is not defined.

I sincerely do not have the faintest idea of the various kinds of modules (ESM, CJS, whatever) and the various issues in bundling javascript so I obviously find it very difficult even to understand what is going on and what kind of problems should I try to solve.
My question is: could there be a default svelte.config.js with a configuration that easily allows one to import modules without hassles or is this impossible for some tricky reason?