chore(nix): add cargo-release

Adding `cargo-release` for managing crate releases

flake.nix

@@ -103,6 +103,7 @@
         # from the toolchain that was specified earlier.
         packages = with pkgs; [
           cargo-nextest
+          cargo-release
           cargo-watch
           ripgrep
           rust-analyzer

release.toml

@@ -0,0 +1,28 @@
+allow-branch = [
+    "main",
+    "!HEAD",
+]
+sign-commit = true
+sign-tag = true
+push-remote = "rad"
+release = true
+publish = true
+verify = true
+owners = ["Fintan Halpenny <fintan.halpenny@gmail.com>"]
+push = true
+push-options = []
+consolidate-commits = false
+pre-release-commit-message = "chore: Release {{crate_name}} version {{version}}"
+pre-release-replacements = []
+tag-message = "chore: Release {{crate_name}} version {{version}}"
+tag-name = "releases/v{{version}}"
+tag = true
+enable-features = []
+enable-all-features = false
+dependent-version = "upgrade"
+metadata = "optional"
+certs-source = "webpki"
+
+[rate-limit]
+new-packages = 5
+existing-packages = 30