This PR makes the necessary modifications to be able to publish the majority of the Nym monorepo workspace crates to https://crates.io (essentially everything aside from binaries, internal tools, and a few select other things).

Overall, this PR:

• defines a workspace version for these crates; we want to keep them all in line with each other, even if that means bumping versions frequently and when there hasn't necessarily been a change in all crates.
  adds a script to use cargo release to publish the SDK + its dependencies - cargo release deals with creating them in the correct order
• excludes crates we dont want to publish via each crates' cargo.toml file
• adds a global version definition for crates in the root cargo.toml
• changes most imports from path to using the workspace version

Todo:

• fix issues re git crates
  • bls crate: upload fork to crates.io
  • merge Upgrade to def_guard_wireguard v0.8.0 #6315 branch to make sure that there is no issue with new clients/gws and legacy ones after the dependency upgrade. If all good, change git import to 0.8.0 from crates as per PR Testing has been done on a NymVPN instance that was compiled with the new dependency interacting with mainnet gateways. The reverse situation will be tested by QA.
• checkin on 'max todo' descriptions
• experiment: remove separate contracts/ workspace - TEMP in max/crates-io-prep-v2-contract-experiment EDIT: publish crates then just use crates.io imports for contracts/
• fix nym-credential-verification compilation errs in dryrun
• add publishing.md writeup

This change is