add codecov badge [skip ci] (#588)

Adds a codecov badge to the README

Signed-off-by: Peter St. John <pstjohn@nvidia.com>

Author: pstjohn

.github/workflows/pre-commit.yml

@@ -37,6 +37,7 @@ jobs:
   build-bionemo-image:
     needs: pre-commit
     runs-on: self-hosted-azure-cpu
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'SKIP_CI') }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4

.github/workflows/unit-tests.yml

@@ -2,7 +2,8 @@
 
 [![Click here to deploy.](https://uohmivykqgnnbiouffke.supabase.co/storage/v1/object/public/landingpage/brevdeploynavy.svg)](https://console.brev.dev/launchable/deploy/now?launchableID=env-2pPDA4sJyTuFf3KsCv5KWRbuVlU)
 [![Docs Build](https://img.shields.io/github/actions/workflow/status/NVIDIA/bionemo-framework/pages/pages-build-deployment?label=docs-build)](https://nvidia.github.io/bionemo-framework)
-![Latest Tag](https://img.shields.io/github/v/tag/NVIDIA/bionemo-framework?label=latest-version)
+[![Latest Tag](https://img.shields.io/github/v/tag/NVIDIA/bionemo-framework?label=latest-version)](https://catalog.ngc.nvidia.com/orgs/nvidia/teams/clara/containers/bionemo-framework/tags)
+[![codecov](https://codecov.io/gh/NVIDIA/bionemo-framework/branch/main/graph/badge.svg?token=XqhegdZRqB)](https://codecov.io/gh/NVIDIA/bionemo-framework)
 
 NVIDIA BioNeMo Framework is a collection of programming tools, libraries, and models for computational drug discovery.
 It accelerates the most time-consuming and costly stages of building and adapting biomolecular AI models by providing