Add Zapier interface simulator, tree-node Merkle lookups, and user docs

In-process trace console validates hops, faults, recoveries, and
suggested changes before zapier-platform push. User guide covers
signup through central-chain and bulk-summary tree-node hash lookup.

packages/verae-zapier/index.js

@@ -11,6 +11,7 @@ const batchTimestamp = require('./creates/batch_timestamp');
 const addNumbers = require('./creates/add_numbers');
 const jobStatus = require('./searches/job_status');
 const hashLookup = require('./searches/hash_lookup');
+const treeLookup = require('./searches/tree_lookup');
 const timestampCompleted = require('./triggers/timestamp_completed');
 
 /**
@@ -76,5 +77,6 @@ module.exports = {
   searches: {
     [jobStatus.key]: jobStatus,
     [hashLookup.key]: hashLookup,
+    [treeLookup.key]: treeLookup,
   },
 };