fix: stream Vivado output live, remove broken normalize_port

JTAG: Start hw_server explicitly (Windows needs it), then run Vivado
TCL with Popen + line-by-line stdout streaming via callback so user
can see Vivado progress in real-time (not just on failure).

COM: Remove normalize_port — pyserial >= 3.0 handles COM>=10 prefix
internally. The manual \\.\ prefix was causing PermissionError(13)
on Windows where pyserial's own handling conflicted.

src/reboot_manager.py

@@ -125,10 +125,9 @@ def reboot_via_serial(
 
     try:
         import serial
-        from serial_monitor import normalize_port
 
         with serial.Serial(
-            normalize_port(config.serial_port),
+            config.serial_port,
             config.serial_baudrate,
             timeout=5,
         ) as ser: