Add EntryWidget embedded view

[rasmustautsglia]

What was solved?
This PR adds the possibility to embed EntryWidget to a view. Also, as was agreed upon within the team, there is no instance of EntryWidget within Glia. EntryWidget instance will be returned from getEntryWidget method

MOB-3479

Release notes:

• Feature
• Ignore
• Release notes (Is it clear from the description here?)
• Migration guide (If changes are needed for integrator already using the SDK - what needs to be communicated? Add underneath please)

Additional info:

• Is the feature sufficiently tested? All tests fixed? Necessary unit, acceptance, snapshots added? Check that at least new public classes & methods are covered with unit tests
• Did you add logging beneficial for troubleshooting of customer issues?
• Did you add new logging? We would like the logging between platforms to be similar. Refer to Logging from iOS SDKs → Things to consider for newly added logs in Confluence for more information.

Screenshots:

[igorkravchenko]

Since this is a visual change, is it possible to attach screenshot of thew view, or it is too early for that?

Also there is a linter warning related to these changes.

[rasmustautsglia]

[rasmustautsglia]

@igorkravchenko Added a screenshot and removed the swiftlint warning in EntryWidget Theme 983e34d

[rasmustautsglia]

!squash