Restructure CRISP folder layout for consistency with Enclave

[cedoor]

The CRISP folder structure should be reorganized to align with Enclave’s conventions and improve maintainability.

Specifically:

• Introduce a new directory structure under examples/CRISP/:
  • examples/CRISP/crates/ → for Rust crates used by CRISP (some code from the current server may be moved here in the future).
  • examples/CRISP/packages/ → for the existing JS SDK, contracts and additional future JS packages (like react utilities).
• Update all relevant Cargo.toml and package.json files to correctly manage the new crates and packages within the workspace.