Find every Mem note on a topic, whatever the collection

**Objective:** Find the notes about {topic} in Mem, optionally limited to the collection titled {collection-title}, and show the most relevant ones.

**Step 1: Narrow the scope**

If {collection-title} is given, call mem-get-collections with 	itle set to it. If it matches no collection or more than one, list what matched and stop. Otherwise note the collection id.

**Step 2: Search**

Call mem-get-notes with 	itle.contains set to {topic} (and collection-id if you have one), with max-records 25. If nothing comes back, try one shorter keyword from the topic and say you did.

**Step 3: Report**

A table of title, collection, updated-at and snippet, newest first, then one sentence on which note looks most central and why.

**Rules & Guidelines:**

* Read only. Never call mem-create-note, mem-update-note, mem-delete-note, mem-trash-note, mem-restore-note, mem-move-note, mem-add-note-to-collection, mem-remove-note-from-collection, mem-set-note-created-date, mem-create-collection, mem-update-collection, mem-delete-collection or mem-mem-it.
* Do not show notes whose 	rashed-at is set unless the user asks for them.

**Validation:**

* If {topic} is empty, ask for it and stop.
* If no notes match, say so rather than guessing.