Add codecov badge to README.md (#135)

* Add codecov badge to README.md

* exclude tests from coverage trace

* add outputs for debugging

* update coverage workflow

* debug coverage dir

* debug coverage dir

* modify exclusion criteria

* revert coverage trace command

---------

Co-authored-by: Steph Prince <[email protected]>

README.md

@@ -4,6 +4,7 @@
 [![Codespell](https://github.com/NeurodataWithoutBorders/aqnwb/actions/workflows/codespell.yml/badge.svg)](https://github.com/NeurodataWithoutBorders/aqnwb/actions/workflows/codespell.yml)
 [![Lint](https://github.com/NeurodataWithoutBorders/aqnwb/actions/workflows/lint.yml/badge.svg)](https://github.com/NeurodataWithoutBorders/aqnwb/actions/workflows/lint.yml)
 [![Docs build](https://github.com/NeurodataWithoutBorders/aqnwb/actions/workflows/doxygen-gh-pages.yml/badge.svg)](https://github.com/NeurodataWithoutBorders/aqnwb/actions/workflows/doxygen-gh-pages.yml)
+[![Coverage](https://codecov.io/github/NeurodataWithoutBorders/aqnwb/coverage.svg?branch=main)](https://app.codecov.io/github/NeurodataWithoutBorders/aqnwb?branch=main)
 
 [![Docs](https://img.shields.io/badge/AqNWB-Docs-8A2BE2?style=flat)](https://neurodatawithoutborders.github.io/aqnwb/)
 [![Code Stats](https://img.shields.io/badge/AqNWB-Code%20Statistics-8A2BE2?style=flat)](https://nwb-overview.readthedocs.io/en/latest/nwb-project-analytics/docs/source/code_stat_pages/AqNWB_stats.html)
@@ -30,4 +31,4 @@ See the [AqNWB Documentation](https://neurodatawithoutborders.github.io/aqnwb/)
 
 For more information about the license, contributing guidelines, code of conduct
 and other  relevant documentation for developers please see the
-[Developer Documentation](https://neurodatawithoutborders.github.io/aqnwb/devdocs.html).
+[Developer Documentation](https://neurodatawithoutborders.github.io/aqnwb/devdocs.html).

cmake/coverage.cmake

@@ -4,7 +4,7 @@
 # customization issues
 set(
     COVERAGE_TRACE_COMMAND
-    lcov -c -q
+    lcov -c --verbose
     -o "${PROJECT_BINARY_DIR}/coverage.info"
     -d "${PROJECT_BINARY_DIR}"
     --include "${PROJECT_SOURCE_DIR}/src/*"