Fix: Removed some GH Actions and ordered issue templates

Changes

Fix: Removed the code style GitHub Action as we now use Pint
Fix: Ordered the issue templates
Fix: Removed the PR build GitHub Action
- This action was removed due to several security and resource concerns:
- Currently non-functional, wasting GitHub Actions resources
- Potential for significant image pollution in the container registry
- Security risk: possible exposure of secrets through PRs with malicious code
- Vulnerability to supply chain attacks if malicious code is executed in builds
- Goes against best practices of thorough code review before building anything on the production GH Action runners
Fix: Removed unused Docker image action -> maybe this is still needed for some test in the future?