feat: add ascii-renderer skill

[i8ramin]

Summary

Add a new skill for generating ASCII art from images or text using the shape vector algorithm.

Features

• Text-to-ASCII: Render any text as ASCII art banners with customizable fonts
• Image-to-ASCII: Convert images to ASCII with sharp edge detection
• Shape vector algorithm: Superior quality vs traditional brightness mapping
• Flexible options: Adjustable contrast, size, invert, and font settings
• Built-in demo: Test without needing an image

Usage Examples

# Text banner
bun run scripts/render.ts --text "DUPE.COM" --cols 80

# Filled letters
bun run scripts/render.ts --text "HELLO" --invert

# Image conversion
bun run scripts/render.ts photo.png --cols 80 --rows 40

Example Output

     =======w:   a===   a===  a======ww  ,=========:
     @@@P#@@@w  &@@@   J@@@  ]@@@PP#@@# `@@@@PPPPP'
     @@@i  `@@@i &@@D   J@@@  ]@@@,,W@@@ ,@@@lwwwwc
     @@@i   @@@i &@@D   ]@@@  ]@@@@@@@P' `@@@@PPPPP
     @@@l,;w@@@' ]@@@c.,W@@@  ]@@@       ,@@@l.,.,..
     @@@@@@@@P'   T@@@@@@@P'  ]@@@       `@@@@@@@@@i

References

• Based on Alex Harri's ASCII rendering blog post

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