Update README (#10)

* fix: Update base README

* add codecov badge

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Co-authored-by: Timofey <5527315+epanchee@users.noreply.github.com>

README.md

@@ -1,2 +1,7 @@
-# astroport-on-osmosis
-Astroport customized contracts specifically for Osmosis integration
+# Astroport on Osmosis
+
+[![codecov](https://codecov.io/gh/astroport-fi/astroport-on-osmosis/graph/badge.svg?token=OrTitOhSKM)](https://codecov.io/gh/astroport-fi/astroport-on-osmosis)
+
+This repository contain Astroport contracts specifically adapted to work on Osmosis.
+
+For more information on how these contracts work within the Astroport architecture, please refer to the [Astroport core](https://github.com/astroport-fi/astroport-core) repository