fix(tui/windows): fix text prompts on windows not displaying any text (#463)

This change addresses #389.

The _crossterm_ implementation on Windows places the terminal in Raw
Mode, which means:

> Input will not be forwarded to screen
> Input will not be processed on enter press
> Special keys like backspace and CTRL+C will not be processed by
terminal driver

To address these issues, I've made the echoing explicit to ensure user
input is visible, and also added support for Backspace, as it didn't
work previously.

I've tested this on Windows and confirmed it's working correctly, with
the username and confirmation displayed as expected, and the password
remaining hidden. I haven't tested on Linux yet, but it should be
working just fine; please kindly verify it first.


![test](https://github.com/user-attachments/assets/df44bf86-b9e0-4a2f-a44d-5281eb58005a)

![20250627204729](https://github.com/user-attachments/assets/35ab6d0b-6761-4056-92da-eb4ad6ff87ea)

fixes #389

Author: sgrtye

src/tui.rs

@@ -22,10 +22,21 @@ pub(crate) fn prompt() -> String {
 	while let Event::Key(KeyEvent { code, .. }) = crossterm::event::read().unwrap() {
 		match code {
 			KeyCode::Enter => {
+				eprintln!();
 				break;
 			}
 			KeyCode::Char(c) => {
 				line.push(c);
+				eprint!("{}", c);
+				let _ = stderr().flush();
+			}
+			KeyCode::Backspace => {
+				if !line.is_empty() {
+					line.pop();
+
+					eprint!("\x08 \x08");
+					let _ = stderr().flush();
+				}
 			}
 			_ => {}
 		}