Miscellaneous Packages from Shared Into Proper Folders (#9638)

* slashutil

* builds

* interop

* viz

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

cmd/password_reader.go

@@ -0,0 +1,22 @@
+package cmd
+
+import (
+	"os"
+
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+// PasswordReader reads a password from a mock or stdin.
+type PasswordReader interface {
+	ReadPassword() (string, error)
+}
+
+// StdInPasswordReader reads a password from stdin.
+type StdInPasswordReader struct {
+}
+
+// ReadPassword reads a password from stdin.
+func (pr StdInPasswordReader) ReadPassword() (string, error) {
+	pwd, err := terminal.ReadPassword(int(os.Stdin.Fd()))
+	return string(pwd), err
+}