improve quartz dev experience

When using quartz it would be beneficial to users to not have to initiate any sort of build process locally and instead copy over pre-built binaries (contracts, enclaves).

Would it be possible to add `--path` arguments for contract and enclave binaries instead of using hardcoded values?

e.g.
```shell
quartz --mock-sgx dev --release --enclave-path ../solver --contract-path ../built-optimized-contract-wasm-bin
```

Start by tracing the `quartz --mock-sgx dev` CLI entry point and where contract and enclave binaries are currently selected. Add support for the requested `--enclave-path` and `--contract-path` arguments, then verify the example command can use pre-built binaries without a local build step.

Written by the indexing model from the issue text.