Add cool.sh dotfile with aliases and shell utilities

[Copilot]

Adds cool.sh as a new dotfile providing a curated set of shell aliases and utility functions suitable for sourcing in .zshrc.

What's included

• ASCII banner — prints a "COOL" greeting with username and date on source
• Aliases — navigation (.., ...), colorized ls, safety-net rm/cp/mv, git shortcuts (gs, gl, gd, gp, gpl), and network helpers (myip, ports)
• Functions
  • mkcd — mkdir -p + cd in one step
  • weather [city] — wttr.in one-liner
  • extract <file> — dispatcher for all common archive formats (.zip, .tar.gz, .7z, etc.)
  • timeit — wraps time
  • note [text] — appends timestamped notes to ~/notes.txt, or prints all notes when called with no args

Source via .zshrc:

source ~/dotfiles/cool.sh

Original prompt

Add a cool file

Created from VS Code.

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