svg placeholder and scoping

svg/index.md

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+# SVG Rendering in Roc
+
+Rendering a subset of the SVG format in Roc.
+
+## In scope
+- paths and shapes
+- strokes and fills
+- generic framebuffer platform
+- simplified SVG representation using Roc's type system
+- demonstrate composing functions
+
+## Out of scope
+- parsing SVG files
+- conforming to SVG spec in any way
+- id-style references
+- text
+- animation
+- gradient and patterns
+- clipping and masking
+- filters
+- trying to be performant
+- trying to get everything in scope done
+
+## Milestones
+- Framebuffer platform: app provides (width, height, RGB bytes)
+- straight paths and fills
+- render Roc's logo
+- lines and rects
+- curved paths, circle, ellipse
+- polyline, polygon
+- stroke
+- render ghostscript tiger
+
+## Roc SVG (from the home page)
+```svg
+<svg width="240" height="240" viewBox="0 0 51 53" fill="none" xmlns="http://www.w3.org/2000/svg">
+    <path d="M23.6751 22.7086L17.655 53L27.4527 45.2132L26.4673 39.3424L23.6751 22.7086Z" fill="#6c3bdc" />
+    <path d="M37.2438 19.0101L44.0315 26.3689L45 22L45.9665 16.6324L37.2438 19.0101Z" fill="#8a66de" />
+    <path d="M23.8834 3.21052L0 0L23.6751 22.7086L23.8834 3.21052Z" fill="#8a66de" />
+    <path d="M44.0315 26.3689L23.6751 22.7086L26.4673 39.3424L44.0315 26.3689Z" fill="#8a66de" />
+    <path d="M50.5 22L45.9665 16.6324L45 22H50.5Z" fill="#6c3bdc" />
+    <path d="M23.6751 22.7086L44.0315 26.3689L37.2438 19.0101L23.8834 3.21052L23.6751 22.7086Z" fill="#6c3bdc" />
+</svg>
+```
+
+## Links
+- [SVG MDN](https://developer.mozilla.org/en-US/docs/Web/SVG)
+- [usvg](https://docs.rs/usvg/latest/usvg/index.html)
+- [roc-svg](https://github.com/Hasnep/roc-svg/tree/main)
+- [ghostscript tiger svg](https://commons.wikimedia.org/wiki/File:Ghostscript_Tiger.svg)