Add code coverage (#97)

* Enhance Jest configuration and CI workflow for improved coverage reporting

- Added coverage collection settings in jest.config.mjs to include TypeScript files while excluding specific patterns.
- Updated GitHub Actions workflow to run tests with coverage and added a step to upload coverage reports to Codecov.
- Included badges in README.md for build status and Codecov coverage tracking.

* Update collectCoverageFrom

* Remove continue-on-error

* Update CI workflow to run on push to main and allow manual dispatch

Author: EugeneKisel-sm

.github/workflows/pull_request.yml

@@ -1,6 +1,11 @@
 name: Continuous Integration
 
-on: pull_request
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
 
 jobs:
   linter: