pRouter has to be excluded from the workspace members

[Soptq]

Currently, if we includes pRouter as a workspace member, we will have some unknown errors during building. Specifically, the building process will complete normally, but when pRouter is running, it will have issues unzipping i2p seeder files downloaded from the genesis server, leading to bootstrap failures. The problem is probably due to some link errors with libzip.

How to reproduce

1. Include pRouter as a workspace member.
2. cargo build
3. start pRouter

pRouter should now be stuck at the starting prouter step. If you check the prouter log file (./prouter_data/prouter.log), you will notice unzipping errors.