Refactor UART testbench and top-level modules; remove old testbench files, enhance UART communication in top_ultrason_uart, and implement LED control via UART in top_led_uart. Add Python scripts for UART communication and data reading.

Semaine 1/Capteur_recule_bidirectionel/Ultrasonic/ultrasonic_fpga.v

@@ -5,7 +5,7 @@ module ultrasonic_fpga #(
     input  wire start,
     inout  wire sig,                // Broche bidirectionnelle vers le capteur
     output reg [15:0] distance,  // Distance mesurée en cm
-    output reg [2:0] state
+    output reg [2:0] state = IDLE
 );
     reg [15:0] trig_counter;
     reg [31:0] echo_counter;