feat: add code-coverage badge

Author: sachinsharma9780

.github/workflows/ci.yml

@@ -71,4 +71,11 @@ jobs:
         run: poetry install
 
       - name: Unit tests
-        run: poetry run pytest tests/unit/ --tb=short --cov=memweave --cov-report=term-missing --cov-fail-under=70
+        run: poetry run pytest tests/unit/ --tb=short --cov=memweave --cov-report=term-missing --cov-report=xml --cov-fail-under=70
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: coverage.xml
+          fail_ci_if_error: false

README.md

@@ -6,6 +6,7 @@
 [![PyPI Downloads](https://static.pepy.tech/personalized-badge/memweave?period=total&units=INTERNATIONAL_SYSTEM&left_color=BLACK&right_color=GREEN&left_text=downloads)](https://pepy.tech/projects/memweave)
 [![Python](https://img.shields.io/pypi/pyversions/memweave)](https://pypi.org/project/memweave/)
 [![CI](https://github.com/sachinsharma9780/memweave/actions/workflows/ci.yml/badge.svg)](https://github.com/sachinsharma9780/memweave/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/sachinsharma9780/memweave/branch/main/graph/badge.svg)](https://codecov.io/gh/sachinsharma9780/memweave)
 [![code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)