docs: showcase commitmentissues badges on README

Dogfood the product on our own README — top-of-page `declared dead`
badge + the atom/atom certificate image, both linking to the live app.

Contributed via @mvanhorn's fork (mvanhorn/commitmentissues).

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

Author: dotsystemsdevs

README.md

@@ -1,3 +1,7 @@
+[![commitmentissues](https://img.shields.io/badge/%E2%9A%B0%20commitmentissues-declared%20dead-cc0000?style=for-the-badge&labelColor=1a0f06)](https://commitmentissues.dev/?repo=atom%2Fatom)
+
+[![atom — Certificate of Death](https://commitmentissues.dev/api/certificate-image/atom/atom)](https://commitmentissues.dev/?repo=atom%2Fatom)
+
 # Commitment Issues
 
 Your abandoned repos deserve a proper funeral.