AT5-734 repository refactor
- removed unused files: docker/*, all devices in tangods/CbfSubarray apart from CbfSubarray, tangods/addDevicesAndProperties.py and configurePollingAndEvents.py, various unused json configuration files/release files
- renamed source folder: tangods -> src/ska_mid_cbf_mcs, removed lowest level of file hierarchy (individual device source folders)
- renamed all source files to snake_case
- relocated all test files to tests/
- updated charts/scripts/imports