Create HA issue if OPNsense Firmware below min version

[Snuffy2]

screenshot using fake firmware version

[Snuffy2]

@alexdelprete if you're good with it, I'd say that we merge this PR and then put out v0.2.1
Feel free to put out the release if you have time to.

[alexdelprete]

Great. Anything special to write in the notes or can I simply use auto-generation for the release?

[alexdelprete]

I was also thinking, now that you added this minimum fw check, if it's possible to check the privileges of the used account and warn the user in case it's not an admin. I don't know if there's an API for that, probably doable via the XMLrpc?

With these 2 checks, we could prevent users from opening issues for those two pre-requirements (e.g. see #175)

[Snuffy2]

It generates an Error if any of the REST queries return a 403 saying there are permission issues.

        elif response.status_code == 403:
            _LOGGER.error(
                f"Permission Error in {inspect.currentframe().f_back.f_code.co_qualname}. Path: {path}. Ensure the OPNsense user connected to HA has full Admin access."
            )

I might be able trigger a similar error in the get_proxy method to represent XMLRPC permission issues, but I'd need to test more.

[alexdelprete]

Sorry, I was referring to the config_flow, in the initial setup phase.

If you check #175 the user has a weird situation...the user seems to have the admin privileges, but the symptoms indicate it actually has a privilege problem.