Categorise our help layout

[IAmVigneswaran]

It is possible to categorise our --help layout. Right now all out flags/switch are grouped together under OPTIONS:.

GENERAL:
  --export-format <airtable | midi | notion>
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IMAGE:
  --image-format <png | jpg | gif>
                          Marker thumb image format. 'gif' is animated and
                          additional options can be specified with --gif-fps
                          and --gif-span. (default: png)
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LABEL:
  --label <id | name | type | checked | status | notes | position | clipType | clipName | clipDuration | videoRole | audioRole | eventName | projectName | libraryName | iconImage | imageFileName>
                          Label to overlay on thumb images. This argument can
                          be supplied more than once to apply multiple labels.
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LOG:
  --result-file-path <path>
                          Path including filename to create a JSON result file.
                          If this option is not passed, it won't be created.
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OTHERS:
  --media-search-path <path>
                          Media search path. This argument can be supplied more
                          than once to use multiple paths. (default: same
                          folder as fcpxml(d))
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