Refactor run method into functions #56

Job	Run time
test	4s
test-multiple-plugins-with-comma-space	5s
test-multiple-plugins-with-commas	5s
test-multiple-plugins-with-newlines	6s
test-single-plugin	4s
test-single-plugin-with-version	5s
test-version-output	3s
test-login	7s
test-login-failure	6s
test-login-with-region-and-group	10s
test-multiple-plugins-with-spaces	9s
test-multiple-plugins-with-versions	5s
test-multiple-plugins-with-versions-and-newlines	4s
test-login-manual	7s
check-dist	10s
test-multiple-platforms (ubuntu-latest)	9s
test-multiple-platforms (ubuntu-24.04)	7s
test-multiple-platforms (ubuntu-22.04)	8s
test-multiple-platforms (ubuntu-20.04)	8s
test-multiple-platforms (macos-latest)	17s
test-multiple-platforms (macos-15)	17s
test-multiple-platforms (macos-14)	12s
test-multiple-platforms (macos-13)	16s
test-multiple-platforms (windows-latest)	31s
test-multiple-platforms (windows-2022)	33s
test-multiple-platforms (windows-2019)	29s
	4m 37s

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