Add changeset

.changeset/great-llamas-buy.md

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+---
+'@responsive-image/build-utils': minor
+'@responsive-image/vite-plugin': minor
+'@responsive-image/webpack': minor
+---
+
+Add caching support
+
+Generated images will be cached, based on the source and image processing config. This is especially useul for the vite-plugin in dev mode (serve), since images are processed on-demand within the Vite dev server middleware.