Ping

Some improvements to the ping utility, focusing on functionality, code structure, and maintainability :

Command-Line Parsing

• Integrated clap for command-line argument parsing.
• Added support for the -t TTL option but currently commented out due to limitations in the netstack and the implementation.

Code Refactoring

• Ping Struct :
  • replaced the Vec used for tracking pending pings with a BTreeMap for more efficient lookups and time-based operations.
• Packet loss calculation :
  • refactored the packet_loss_percentage calculation for improved readability and accuracy.
• General cleanup :
  • removed outdated or redundant comments.
  • simplified logic in various parts of the code.

Thank you !