* [haskell-http-client] fix codegen issues
* ensure datatypeWithEnum is set on codegenParameter when is enum
* [haskell-http-client] fix isAlias + arrayModelType missing "datatype"
* [haskell-http-client] param.isListContainer is sometimes false for list types
* [haskell-http-client] gen MimeNoContent instances automatically
* [haskell-http-client] fix example-app and integration tests
* [haskell-http-client] update docs
* [haskell-http-client] handle */* mimetype correctly
* [haskell-http-client] generate separate api modules, for each child api
* [haskell-http-client] add cliOption "allowNonUniqueOperationIds"
When cli option "allowNonUniqueOperationIds" is true,
allows *different* API modules to contain the same operationId,
and then each API must be imported qualified.
