OpenAPI Input Format Validations

[tarunKoyalwar]

Please describe your feature request:

when generating requests using openapi schema file, certain validations / placeholder logic needs to be implemented for consistency and overall app behaviour

Tasks

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1. Allow passing openapi params + override params using -V -var flag
2. Support -required-only flag to only use required params when generating requests
3. fatal error when global auth parameters or required parameters are missing
4. allow skipping any and all requests[s] when required params are not available using -skip-format-validation flag
5. Fallback to default placeholder values when required params are not given and -skip-format-validation is used
6. For Ease of Use auto generate and load required_openapi_params.yaml config file when required parameters are not given ( in CLI Mode only)
7. Optional Support specifying optional parameters in required_openapi_params.yaml config file