chore: update readme (#228)

Co-authored-by: Hunter Johnston <64506580+huntabyte@users.noreply.github.com>

README.md

@@ -2,6 +2,11 @@
 
 The headless components for Svelte.
 
-[Read the docs](https://bits-ui.com) (still a work in progress)
+[Read the docs](https://bits-ui.com)
 
-Powered by [Melt UI](https://melt-ui.com) builders.
+## Credits
+
+- [Bitworks](https://bitworks.cz) - The design team behind the Bits UI documentation and example components.
+- [Melt UI](https://melt-ui.com) - The underlying builder API that powers Bits.
+- [Radix UI](https://radix-ui.com) - The incredible headless component APIs that we've taken heavy inspiration from.
+- [React Spectrum](https://react-spectrum.adobe.com) - An incredible collection of headless components we've taken inspiration from.