nmcli idempotency connection check

[saibug]

SUMMARY

This PR will update the module to be idempotent by:

• Checking the current connection status before executing commands.
• Avoiding unnecessary commands when the desired state has already been achieved.
• Returning changed=False when no action is required.
• Properly managing check mode for up and down states.
• The module will no longer generate changes when an interface is already in the desired state, so that respect Ansible's idempotence principle.

Ref : #9897

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

• nmcli

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[felixfontein]

Thanks for your contribution! Could you please add a changelog fragment? Thanks.

Also having tests for this would be helpful.

[saibug]

Thanks for your contribution! Could you please add a changelog fragment? Thanks.

Also having tests for this would be helpful.

@felixfontein thanks for replying..
OK I would update PR with your observations.