Add `deno-deploy` node export condition

[dsherret]

What problem are you trying to solve?

See tursodatabase/libsql-client-ts#297 -- In the Deno CLI it would be good to use the ffi version, but in Deploy it should use the web version. This would be helpful for that.

Describe the solution you'd like

Use the deno-deploy export when resolving conditional exports.

Describe alternatives you've considered

..

Documentation, Adoption, Migration Strategy

No response