[typescript-axios] Add Support for Operation Servers

[ckoegel]

This PR aims to add support for operation level servers in the typescript-axios generator. A new object (operationServerMap) has been added to the base.ts file, this object contains all server objects defined at the operation level in the openapi spec file. Inside the functional programming interface for each API, each operation now checks for a server url defined in operationServerMap using the new serverIndex attribute of the Configuration class. If a url is found, that url will be used instead of the default BASE_URL. This change should be non-breaking; if there is not a server defined on the operation level, the behavior will not change. serverIndex is an optional parameter on the Configuration class and defaults to 0.

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[wing328]

Thanks for the PR. Overall it looks good to me. From what I understand, this is not a breaking change.

Please correct me if I'm wrong.

[ckoegel]

Thanks for the PR. Overall it looks good to me. From what I understand, this is not a breaking change.

Please correct me if I'm wrong.

You're correct, this should be non-breaking

[modifyljf]

Is it possible to disable this feature?