🌐 Add a Script to Check Internet Speed via speedtest-cli

[HashSlap]

Description:
Make a script that:

Checks if speedtest-cli is installed

Runs it and prints the download, upload, and ping values

Also include install instructions if it's not installed.

📁 Path: network/internet-speed-check.sh
🛠 Bash Tools: command -v, speedtest-cli, echo

[devanshsonii]

I would like to tackle this one.