Improve examples and documentation

[uncenter]

I think our current examples (examples/ directory) aren't a great representation of what Whiskers can do and should be used for. As @sgoudham mentioned in Discord, linking to Whiskerified ports is probably the way to go here.

Some ports we could include are:

• https://github.com/catppuccin/lazygit (already linked to in README, could mention again)
• https://github.com/catppuccin/cider (more complex build process and templates)
• https://github.com/catppuccin/fr33zmenu (literally the ideal example of a Whiskers port - simple build process, no extra variants or complicated logic)
• https://github.com/catppuccin/imhex/blob/main/imhex.tera (macros used)
• https://github.com/catppuccin/k9s/blob/main/k9s.tera (macros, variants)
• https://github.com/catppuccin/raycast/blob/main/raycast.tera (template for content in README)
• https://github.com/catppuccin/termux/blob/main/termux.tera (term colors port)