Traits and interfaces file name standard

[felipeelia]

Is your feature request related to a problem?

Although we have a standard for class file names, we don't have one for traits or interfaces.

Describe the solution you'd like

For consistency with what we currently require for classes, a trait file name should be prefixed with trait- and an interface file name should be prefixed with interface-.

I'm not a big fan of these prefixes but as we enforce them to classes, it seems to make sense have them for traits and interfaces too.

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Issue #1327 mentions the problem but it's almost 2 years old now. As these elements can already be used in core, it would be awesome if these standards are defined before it happens :)

[jrfnl]

@felipeelia Thanks for raising the issue. There will be a blog post which will contain a proposal for this on Make in the near future and I expect we will be able to address this in WPCS 3.0.0.

[jrfnl]

FYI: I'm removing this from the 3.0.0 milestone as this was one of the items in the Make post which gathered discussion without consensus being reached. The intention is to revisit this in a separate Make post at a later date.