Upgrade Complex Todos to Meteor 3

[leonardoventurini]

Replace svelte:compiler with zodern:melte, which seems to work in Meteor 3. Bear in mind that Svelte 4 & 5 are not yet supported.

Bypass other packages in order to get it running: msavin:sjobs, rdb:svelte-meteor-data, aldeed:collection2 and svelte:blaze-integration. Need re-add them once they are upgraded or find alternatives.