os: add input_password(prompt) and unit tests (#15507)

examples/password/correct.expect

@@ -0,0 +1,8 @@
+#!/usr/bin/expect
+spawn ./password
+expect "Enter your password : "
+send "Sample\r"
+expect "Confirm password : "
+send "Sample\r"
+expect "Password confirmed! You entered: Sample ."
+expect eof

examples/password/incorrect.expect

@@ -0,0 +1,8 @@
+#!/usr/bin/expect
+spawn ./password
+expect "Enter your password : "
+send "Sample123\r"
+expect "Confirm password : "
+send "Sample234\r"
+expect "Passwords do not match ."
+expect eof

examples/password/password.v

@@ -0,0 +1,14 @@
+module main
+
+import os
+
+fn main() {
+	original_password := os.input_password('Enter your password : ')!
+	repeated_password := os.input_password('Confirm password : ')!
+
+	if original_password == repeated_password {
+		println('Password confirmed! You entered: $original_password .')
+	} else {
+		println('Passwords do not match .')
+	}
+}

examples/password/password_ci.vsh

@@ -0,0 +1,3 @@
+chdir('examples/password')?
+assert execute('./correct.expect').exit_code == 0
+assert execute('./incorrect.expect').exit_code == 0