chore: add .gitattributes to prevent binary asset corruption on Windows

core.autocrlf=true was causing git to apply CRLF normalization to
image files, making all assets show as modified on Windows checkouts.
Mark binary types (png, jpg, gif, webp, ico) as binary to prevent this.

Author: bharvey88

.gitattributes

@@ -0,0 +1,11 @@
+# Treat image files as binary — prevents CRLF mangling on Windows
+*.png binary
+*.PNG binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.webp binary
+*.ico binary
+
+# SVG is XML/text — normalize line endings to LF
+*.svg text eol=lf