fix: place fonts.css import inside tokens layer

A bare @import before the layer order declaration broke cascade
resolution in browsers, disabling all layered styles.

Author: danielnaab

src/design/index.css

@@ -1,7 +1,6 @@
-@import url("./fonts.css");
-
 @layer reset, tokens, base, compositions, layout, components, utilities;
 
+@import url("./fonts.css") layer(tokens);
 @import url("./reset.css") layer(reset);
 @import url("./tokens.css") layer(tokens);
 @import url("./base.css") layer(base);