Add format option to net block

[gurditsbedi]

PR for the issue #692 .
The format option is added to the net block by this PR.
If a user uses a deprecated option, the format option will not be used. This helps users into transitioning to the new options.

[ammgws]

Might need to check the logic.

Using this config on my wired desktop:

[[block]]
block = "net"

Get this: Error in block 'net': Signal strength is only available for connected wireless devices.

[gurditsbedi]

Confirming the error. Will look into it.

[ammgws]

Did you figure it out?

[gurditsbedi]

Did you figure it out?

I think 83a8311 fixed it. Is the issue still not resolved?

[gurditsbedi]

Looks like, I did a silent commit and I didn't announce the update in the thread.

[ammgws]

Can you fix the blocks.md conflict?

[gurditsbedi]

I think its done.
Sorry I am new to this, so I thought that the "merger to master" resolve the conflicts, that to for no reason at all.

[gurditsbedi]

I see that the last issue was relating to line endings. "\n" and "\r\n".
I think we should decide upon the type of line ending to be used in the project.

Also we can do the following

1. checking of line endings in the CI pipeline.
   OR
2. add a git hook commit script.

[ammgws]

They should all be Unix line endings. I fixed the conflict for now.

[ammgws]

Thanks!