Update dependencies (rand, bitflags, eetf)

[sile]

Copilot Summary

This pull request includes updates to dependencies in the Cargo.toml file and enhancements to the DistributionFlags struct in src/flags.rs. The most important changes are:

Dependency updates:

• Updated bitflags from version 1 to 2 in Cargo.toml
• Updated eetf from version 0.8 to 0.9 in Cargo.toml
• Updated rand from version 0.8 to 0.9 in Cargo.toml

Code enhancements:

• Added Debug, Clone, Copy, PartialEq, Eq, and Hash traits to DistributionFlags struct in src/flags.rs