Add p23/testnet section to software versions (#1609)

* started p23/testnet section to software versions

* add second column for pkg version to p23 testnet versions table

* add more package version values

* added rust crate versions

* typo

* consolidated summary release highlights

* new build

---------

Co-authored-by: Bri Wylde <brianawylde@gmail.com>

Author: sreuland

docs/networks/software-versions.mdx

@@ -12,6 +12,33 @@ Release candidates are software releases that are also released to the [Testnet]
 
 [testnet]: ./README.mdx
 
+## Protocol 23 (Testnet only, July 17, 2025)
+
+### Software
+
+| Software | Version | Package |
+| --- | --- | --- |
+| XDR | `v23.0` | `n/a` |
+| Rust XDR | `23.0.0-rc.2` | `rust crate: stellar-xdr:23.0.0-rc.2` |
+| Stellar Rust Host Environment | `23.0.0-rc.2` | `rust crate: soroban-env-host:23.0.0-rc.2.1` |
+| Stellar Core | `23.0.0rc4` | `debian: stellar-core:23.0.0-2587.rc4` |
+| Stellar Rust SDK | `23.0.0-rc.2.2` | `rust crate: soroban-sdk:23.0.0-rc.2.1` |
+| Stellar CLI | `23.0.0` | `rust crate: stellar-cli:23.0.0` |
+| Stellar RPC | `v23.0.0-rc.2` | `debian: stellar-rpc:23.0.0~rc2-127` |
+| Stellar Horizon | `v23.0.0-rc2` | `debian: stellar-horizon:23.0.0~rc2-508` |
+| Stellar Quickstart | `main` | `docker.io/stellar/quickstart:sha256:d4f752eece1e8780d19f4bd2726845996c413c0f4c4f57d1e4a9ff450442fc29` |
+| Stellar JS Stellar Base | `v14.0.0-rc.2` | `NPM: 14.0.0-rc.2` |
+| Stellar JS Stellar SDK | `v14.0.0-rc.3` | `NPM: 14.0.0-rc.3` |
+| Freighter | `n/a` | `n/a` |
+
+### Release notes
+
+New features in Protocol 23:
+
+- [Release Notes](https://github.com/stellar/stellar-core/releases/tag/v23.0.0rc4)
+- Unified Events: [CAP-67](https://github.com/stellar/stellar-protocol/blob/master/core/cap-0067.md)
+- State Archival: [CAP-62](https://github.com/stellar/stellar-protocol/blob/master/core/cap-0062.md) and [CAP-66](https://github.com/stellar/stellar-protocol/blob/master/core/cap-0066.md)
+
 ## Protocol 22 (Mainnet, December 5, 2024)
 
 ### Software