feat: port builder :report subcommands to golang

The bash :report implementations for the dockerfile, herokuish, lambda, nixpacks, pack, and railpack builders are replaced with a compiled golang binary that collects report keys in parallel and marshals json directly, avoiding the per-key subshell and jq forks that made the bash reports slow. The subcommands/report and root report trigger become symlinks to the compiled binary, while the non-report bash helpers each plugin still relies on are left in place.

plugins/builder-lambda/subcommands.go

@@ -0,0 +1,29 @@
+package builderlambda
+
+import (
+	"errors"
+
+	"github.com/dokku/dokku/plugins/common"
+)
+
+// CommandReport displays a builder-lambda report for one or more apps
+func CommandReport(appName string, format string, infoFlag string) error {
+	if len(appName) == 0 {
+		apps, err := common.DokkuApps()
+		if err != nil {
+			if errors.Is(err, common.NoAppsExist) {
+				common.LogWarn(err.Error())
+				return nil
+			}
+			return err
+		}
+		for _, appName := range apps {
+			if err := ReportSingleApp(appName, format, infoFlag); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	return ReportSingleApp(appName, format, infoFlag)
+}