feat: Update flash script and modify to use MT for ctrl

flash.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+SOURCE_DIR="."
+# Update this path if your system mounts the drive elsewhere
+DEST_DIR="/run/media/$(whoami)/NICENANO"
+
+CENTRAL_FILE="corne-rs-central.uf2"
+PERIPHERAL_FILE="corne-rs-peripheral.uf2"
+
+wait_and_copy() {
+    local file_to_copy=$1
+    local half_name=$2
+
+    echo ">>> Waiting to flash the $half_name half..."
+    echo "    Connect the $half_name keyboard half to put it into bootloader mode."
+
+    while [[ ! -d "$DEST_DIR" ]]; do
+        sleep 1
+    done
+
+    echo "    NICENANO drive detected for $half_name half."
+    # Brief pause to ensure the filesystem is fully mounted and ready
+    sleep 0.5 
+
+    echo "    Copying $file_to_copy..."
+    cp "$SOURCE_DIR/$file_to_copy" "$DEST_DIR/"
+    
+    echo "    Copy complete. Waiting for device to reboot and disconnect..."
+
+    while [[ -d "$DEST_DIR" ]]; do
+        sleep 1
+    done
+
+    echo "    $half_name half has been flashed and disconnected."
+    echo
+}
+
+if [ ! -f "$SOURCE_DIR/$CENTRAL_FILE" ]; then
+    echo "Error: $CENTRAL_FILE not found in the current directory."
+    exit 1
+fi
+
+if [ ! -f "$SOURCE_DIR/$PERIPHERAL_FILE" ]; then
+    echo "Error: $PERIPHERAL_FILE not found in the current directory."
+    exit 1
+fi
+
+wait_and_copy "$CENTRAL_FILE" "CENTRAL"
+wait_and_copy "$PERIPHERAL_FILE" "PERIPHERAL"
+
+echo ">>> All done. Both halves have been flashed."