refactor: first pass at rewriting apps plugin in go

plugins/apps/vendor/github.com/codeskyblue/go-sh/example/tail/tailf.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"github.com/codeskyblue/go-sh"
+)
+
+func main() {
+	flag.Parse()
+	if flag.NArg() != 1 {
+		fmt.Println("Usage: PROGRAM <file>")
+		return
+	}
+	sh.Command("tail", "-f", flag.Arg(0)).Run()
+}