fix(lit-html): import trusted-types/lib barrel explicitly.
#4956
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Fixes #4943
Import barrels from trusted-types/lib explicitly for compatibility with modern Node resolution.
I added a minimal test project and cover for a few module/moduleResolution pairs that I think are likely to be used with Lit.
This is related in some ways to
https://github.com/lit/lit/blob/main/CONTRIBUTING.md#typescript.
trusted-typeswas imported as an implicit directory index file (aka barrel), which is not supported with the module resolution algorithm of NodeJS (w/ ESM): https://nodejs.org/api/esm.html#mandatory-file-extensions.