fix mismatched dependency issues

[mdynnl]

By using ?external, this PR should solve most of the mismatched dependency issues caused by esm.sh's static build.

[mdynnl]

playground for testing https://playground.solidjs.com/anonymous/0cdb8878-4a56-47a2-9b31-2bf6ceb65eab
https://discord.com/channels/722131463138705510/1269396988429074706/1269774766408073332

[milomg]

I would prefer if this were generic to all dependencies, but a brief glance at esm.sh doesn't reveal an easy way to do it automatically (I'd rather not just mark all keys as external for all packages because we'd get quadratic blowup and things would be less editable). Before I merge this, do you have any ideas that I should explore in that direction?

Update: Maybe https://jspm.org/docs/generator/stable/?

[mdynnl]

https://discord.com/channels/722131463138705510/958428791124951050/1273364166241026109
Definitely, will open up a new PR.

[mdynnl]

#183

It's still possible with esm.sh too, take this for example https://esm.sh/@solid-primitives/memo?external=@solid-primitives/memo,solid-js but we'll have to put every deps there so not really suitable.

[mdynnl]

closed in favor of #183