Prepare rust crates' metadata for publishing

[andreacorbellini]

Summary

Added description, keywords, and links to the crates that will be published to crates.io (plus a few more crates for consistency).

Also added a version number to the ironfish-rust -> ironfish-zpk dependency: this version number will be required in order to publish ironfish-rust to crates.io.

Testing Plan

Ran cargo publish --dry-run for ironfish-zkp, and inspected the resulting .crate files. Relevant output:

[package]
edition = "2021"
name = "ironfish_zkp"
version = "0.1.0"
authors = ["Iron Fish <contact@ironfish.network> (https://ironfish.network)"]
description = "Sapling API and zero-knowledge proving mechanism for the Iron Fish node"
homepage = "https://ironfish.network/"
readme = "README.md"
keywords = [
    "iron-fish",
    "sapling",
    "zero-knowledge",
]
license = "MIT OR Apache-2.0"
repository = "https://github.com/iron-fish/ironfish"
resolver = "1"

It is not possible at the moment to run cargo publish --dry-run for ironfish-rust because ironfish-zkp needs to be published first.

Documentation

N/A

Breaking Change

Not a breaking change

[mat-if]

Suggested change

	description = "Rust create for interacting with transactions on the Iron Fish chain"
	description = "Rust crate for interacting with transactions on the Iron Fish chain"