feat: add device info decorator for attributes

[redryerye]

This PR

• Adds option to add basic info as context

Notes

As a user of the SDK, I would like to have a default option in the SDK to add basic attributes (OS info, device info, locale, app info), similar to what Confidence provides.
The changes are mostly based on their implementation.

Since the SDK is targeted to iOS, I believe it would be useful to offer this option :)

How to test

You can add attributes with

let attributes = DeviceInfoAttributeDecorator(
        withDeviceInfo: true,
        withAppInfo: true,
        withOsInfo: true,
        withLocale: true
).decorated(attributes: [:])
let context = MutableContext(attributes: attributes)

[beeme1mr]

Hey @redryerye, thanks for the PR. I think this is a good idea but we should probably align the attribute names so they can be consistently implemented. FYI @open-feature/technical-steering-committee

[redryerye]

Hey @redryerye, thanks for the PR. I think this is a good idea but we should probably align the attribute names so they can be consistently implemented. FYI @open-feature/technical-steering-committee

Let me know if there is anything I can help with.

[beeme1mr]

Let me know if there is anything I can help with.

No, not at the moment. I brought this up in today's Governance meeting, and we all felt like this is a good idea. The main concern is standardizing context attribute naming. We're going to evaluate Segment and OTel to see where there are overlaps. By the looks of it, this PR aligns with Segment's structure.

[beeme1mr]

@nicklasl, how did Confidence define these attribute names?

[nicklasl]

@nicklasl, how did Confidence define these attribute names?

Sorry about missing this ping.
There is not much thinking about them. We felt it make sense to group these in different structs and the naming makes somewhat sense on both Android and iOS.

If we (OF) do a bigger workthrough on the naming, I'm sure we'll align the internal Confidence implementations as well for consistency.