Update README.md to include links for major splat file formats (#185)

Author: querielo

README.md

@@ -32,7 +32,7 @@
 - Portable: Works across almost all devices, targeting 98%+ WebGL2 support
 - Renders fast even on low-powered mobile devices
 - Render multiple splat objects together with correct sorting
-- Most major splat file formats supported including .PLY (also compressed), .SPZ, .SPLAT, .KSPLAT
+- Most major splat file formats supported including: [.PLY](https://github.com/graphdeco-inria/gaussian-splatting) (also [compressed](https://blog.playcanvas.com/compressing-gaussian-splats/#compressed-ply-format)), [.SPZ](https://github.com/nianticlabs/spz), [.SPLAT](https://github.com/antimatter15/splat), [.KSPLAT](https://github.com/mkkellogg/GaussianSplats3D), [.SOG](https://developer.playcanvas.com/user-manual/gaussian-splatting/formats/sog/)
 - Render multiple viewpoints simultaneously
 - Fully dynamic: each splat can be transformed and edited for animation
 - Real-time splat color editing, displacement, and skeletal animation