R1:208504a5e363

Provide "almanac.binding.search" and "almanac.binding.edit"

Summary:
Depends on D19338. Ref T13120. Ref T12414. These are the last of the new API methods.

This stuff still doesn't work:

- You can't actually enable/disable bindings yet. I want to take a look at the use cases and consider changing "disabled" to "status", or providing a different way to solve the problem.
- You can't edit properties via the API. I expect to enable this for all `AlmanacPropertyInterface` objects with an extension in a…