add example diagnostics script

DebugMenu/README.md

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+# Example Diagnostics Script
+
+This is an example diagnostics script.
+
+1) Start up a SSH server. i.e. `sudo wolfsshd -f sshd_config.txt`
+2) Use an SSH client to connect and run the script. i.e. `ssh <usr>@<ip> diagnostics.sh`
+3) If transfering a file use SCP. i.e. `scp localFile <usr>@<ip> /tmp/`

DebugMenu/diagnostics.sh

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+#!/bin/bash
+
+printf "===============================\n\r"
+printf "   Example SSH Diagnostics\n\r"
+printf "===============================\n\r"
+stty -a
+
+# Menu display
+show_menu() {
+    printf "Select an option:\n\r"
+    printf "To transfer a file run scp localfile <user>@<ip>:/tmp\n\r"
+    printf "1. Print a file to stdout\n\r"
+    printf "2. Run a simple program\n\r"
+    printf "3. Enter an interactive Bash shell\n\r"
+    printf "4. Exit\n\r"
+    printf "Enter your choice [1-4]: \n\r"
+}
+
+
+print_file() {
+    echo -n "Enter the file to print out: "
+    read file
+    if [[ -f "$file" ]]; then
+        echo "Contents of $file:"
+        cat "$file"
+    else
+        echo "File not found!"
+    fi
+}
+
+# Function to run a simple program
+run_program() {
+    printf "Running an example  simple diagnostic program...\n\r"
+    printf "System Uptime:\n\r"
+    uptime
+    printf "Disk Usage:\n\r"
+    df -h
+    printf "Memory Usage:\n\r"
+    free -h
+}
+
+# Main loop
+while true; do
+    show_menu
+    read choice
+    case $choice in
+        1)
+            print_file
+            ;;
+        2)
+            run_program
+            ;;
+        3)
+            printf "Entering interactive Bash shell. Type 'exit' to return to the menu.\n\r"
+            bash
+            ;;
+        4)
+            printf "Exiting SSH Diagnostics Server. Goodbye!\n\r"
+            break
+            ;;
+        *)
+            printf "Invalid choice, please try again.\n\r"
+            ;;
+    esac
+done
+
+exit 0