Deprecated: In kin-openapi v0.126.0 (https://github.com/getkin/kin-openapi/tree/v0.126.0?tab=readme-ov-file#v01260) the Circular Reference Counter functionality was removed, instead resolving all references with backtracking, to avoid needing to provide a limit to reference counts.

ParseCommandLineList parses comma separated string lists which are passed in on the command line.

The input mapping is expressed on the command line as `key1:value1,key2:value2,...` We parse it here, but need to keep in mind that keys or values may contain commas and colons.