svelte/internal import guard #861
Description
Describe the problem
access to svelte/internal should be limited to blessed code (mostly compiler output).
But for technical reasons it is exported from the svelte package and can be imported by anyone, and a lot of code does: https://github.com/search?q=%22svelte%2Finternal%22+&type=code
Describe the proposed solution
add a guard in resolveId that logs a warning or throws an error upon encountering such an import.
Alternatives considered
maybe eslint-plugin-svelte would also be able to flag these
Importance
nice to have