Bump version to 23.1.0

[github-actions]

What

Bump version to 23.1.0, creating release branch.

Why

Triggered by @sagpatil in https://github.com/stellar/stellar-cli/actions/runs/17281797315.

What is next

See the release instructions for a full rundown on the release process:
https://github.com/stellar/actions/blob/main/README-rust-release.md

Commit any changes to the release/v23.1.0 branch that are needed in this release.

If this is a regular release releasing from main, merge this PR when ready, and after merging, create a release for this version by going to this link: https://github.com/stellar/stellar-cli/releases/new?tag=v23.1.0&title=23.1.0

If this is a backport or patch release of a past version, see the release instructions. When ready to release this branch create a release by going to this link:
https://github.com/stellar/stellar-cli/releases/new?tag=v23.1.0&title=23.1.0&target=release/v23.1.0

[leighmcculloch]

I pushed a fix that should make the publish dry run build pass: 5588e84

The jankyness of the feature is because we're using two features to represent a binary state. Next major version we should use a single feature instead of two. Cargo and other tooling doesn't handle features well that don't coexist.

[sagpatil]

closing this as we need a build with this fox merged #2162