Sometimes it can be useful to run more advanced logic against a Realm that is not just a query.

Examples:

• Batch updates with logic
• Checking Query-based privileges
• Doing advanced filtering not expressible in one query
• Debugging

In those cases it would be helpful with a REPL like interface where people can copy-paste Javascript code into and have it evaluated against the current Realm.

A (hopefully) easy first implementation would be to use the Log component as a basis for this.

The current Realm should be exposed as a realm variable people can use, possibly also the currently logged in user.