Add ...Import IPC2581 .cvg directly

[aohta2021]

Description of the feature

User want to import IPC 2581 to PyEDB directly.
Now we are use of anstranslator from IPC2581 to EDB.

Steps for implementing the feature

No response

Useful links and references

No response

[svandenb-dev]

@aohta2021 thanks for your request. I have added cvg file extension support.