refactor: Decompose syscalls into pkg, start adding utility commands

pkg/readers/counter.go

@@ -0,0 +1,17 @@
+package readers
+
+import "io"
+
+type Counter struct {
+	Reader io.Reader
+
+	BytesRead int
+}
+
+func (r *Counter) Read(p []byte) (n int, err error) {
+	n, err = r.Reader.Read(p)
+
+	r.BytesRead += n
+
+	return n, err
+}