add changelog to msw-atproto

Author: essential-randomness

msw-atproto/CHANGELOG.md

@@ -0,0 +1,10 @@
+# @fujocoded/astro-smooth-action
+
+## 0.0.1
+
+First release, yay!
+
+As said in the README: `@fujocoded/msw-atproto` uses the power of
+[MSW](https://mswjs.io/) to give you(r tests) fake, <u>stateful</u> ATproto
+accounts that respond to HTTP requests exactly like real PDSes on the real
+network would!