Allow root flags to be specified after subcommands#607

### Description Currently, the flags that are defined for the root command can't be used after the subcommand. This is a use case considered as global flags. It does work if the root flags are specified before the subcommand. However, it's quite unintuitive. cli/src/bashly.yml ```yaml name: cli version: 0.1.0 flags: - long: --unzip short: -u default: example.com commands: - name: download args: - name: url required: true ``` ```console $ ./cli --unzip download https://example.com/file.zip # this works $ ./cli download https://example.com/file.zip --unzip # throws invalid flag error ```