refactor: add runnable picocli commands (planning#2217)

java/cli/src/main/java/dev/fitko/fitconnect/cli/CLI.java

...java/dev/fitko/fitconnect/cli/commands/ConfigCommand.java

.../fitko/fitconnect/cli/commands/CreateTestKeysCommand.java

...tko/fitconnect/cli/commands/GetAllSubmissionsCommand.java

...itko/fitconnect/cli/commands/GetOneSubmissionCommand.java

...v/fitko/fitconnect/cli/commands/GetSubmissionCommand.java

...java/dev/fitko/fitconnect/cli/commands/KeyGenCommand.java

...ko/fitconnect/cli/commands/ListAllSubmissionsCommand.java

...n/java/dev/fitko/fitconnect/cli/commands/ListCommand.java

.../java/dev/fitko/fitconnect/cli/util/SubmissionWriter.java