Add automated test-cases execution for all the test -scenarios for different inputs

[VatsalJagani]

Add automated test-cases execution for all the test -scenarios for different inputs
like - user-defined commands execution and other scenarios

• Add sample apps in some directory
• App-inspect failure should fail the workflow (in test it should be like a failure should pass the test case and pass should fail the test case)
• Add test case for command execution before running the workflow action.
• Add test case for the valid successfully passing app, build, and app-inspect checks.
• Add test-case for the repo root directory (app_dir=.) case (Check and if possible use cd before executing the main workflow to see if this is going to replicate the scenario correctly or not)
• Test scenario where app_package_id is not provided in the app.conf
• Test scenario where app_package_id is not there in app.conf also not provided as parameter