EN-207 Add asset folder codenames

[matus12]

Motivation

Adding support for asset folder codenames, so assets can be inserted into specific folder, referenced by its codename.

Checklist

• Code follows coding conventions held in this repo
• Automated tests have been added
• Tests are passing
• Docs have been updated (if applicable)
• Temporary settings (e.g. variables used during development and testing) have been reverted to defaults

How to test

Try getting / adding asset folders with codenames, adding asset to a folder referenced by codename.

[pokornyd]

I would lose this unnecessary else statement and use null coalescing to make it a bit more compact. also, wouldn't folder be more fitting variable name than itm in the foreach? seems slightly more readable, but that's just a nitpick

        foreach (var folder in folders)
        {
            if (folder.Id == folderId)
            {
                return folder;
            }

            var nestedFolder = folder.Folders?.GetFolderHierarchyById(folderId);
            if (nestedFolder != null) //This is required so you don't stop processing if the root contains many folders (let the above foreach loop continue)
            {
                return nestedFolder;
            }
        }

[matus12]

Yeap, looks good, fixed.

[pokornyd]

ditto

[matus12]

Fixed