Add support for the nix package manager (#606)

Author: JamieMagee

internal/infra/run.go

@@ -273,30 +273,31 @@ var packageManagerLookup = map[string]string{
 	"bundler":        "bundler",
 	"cargo":          "cargo",
 	"composer":       "composer",
-	"pub":            "pub",
-	"docker":         "docker",
+	"devcontainers":  "devcontainers",
 	"docker_compose": "docker-compose",
+	"docker":         "docker",
 	"dotnet_sdk":     "dotnet-sdk",
 	"elm":            "elm",
 	"github_actions": "github-actions",
-	"submodules":     "gitsubmodule",
 	"go_modules":     "gomod",
 	"gradle":         "gradle",
-	"julia":          "julia",
-	"maven":          "maven",
 	"helm":           "helm",
 	"hex":            "mix",
-	"nuget":          "nuget",
+	"julia":          "julia",
+	"maven":          "maven",
+	"nix":            "nix",
 	"npm_and_yarn":   "npm",
+	"nuget":          "nuget",
 	"opentofu":       "opentofu",
 	"pip":            "pip",
 	"pre_commit":     "pre-commit",
-	"terraform":      "terraform",
+	"pub":            "pub",
+	"rust_toolchain": "rust-toolchain",
+	"submodules":     "gitsubmodule",
 	"swift":          "swift",
-	"devcontainers":  "devcontainers",
+	"terraform":      "terraform",
 	"uv":             "uv",
 	"vcpkg":          "vcpkg",
-	"rust_toolchain": "rust-toolchain",
 }
 
 func setImageNames(params *RunParams) error {