Building an artifact for package individually

An artifact can be build individually for a package, sfp will determine the type of a package and the corresponding api's will be invoked

// Sample sfdx project json 
{
  "packageDirectories": [
    {
      "path": "./src-env-specific-pre",
      "package": "src-env-specific-pre",
      "versionNumber": "1.0.0.0",
    },
    {
      "path": "./src/frameworks/feature-mgmt",
      "package": "feature-mgmt",
      "versionNumber": "1
    }
  ]
}

// Build a single package
sfp build -v devhub --branch=main -p feature-mgmt