Testnet Alpha

Alpha release of testnet for internal testing

What's Changed

• Update README.md and workflow by @Mixa84 in #2
• Autodetect configuration changes in rates server by @fare in #40
• Decimal denomination to assets by @Mixa84 in #41
• Nix Update by @fare in #39
• Testnet chainparams by @Mixa84 in #44
• Rates: add getassets feature by @fare in #46
• More Nix Update by @fare in #42

Full Changelog: signet-v1.0...testnet-alpha

Signet v1.0

Signet for testing Sequentia features