feat: implement managed array for schemaRecord

[richgt]

Adds support for simple autotracked arrays to schema-record.

basic schema:

{
  name: 'favoriteNumbers',
  type: null,
  kind: 'array',
},

per-item transformation is supported:

 {
  name: 'favoriteNumbers',
  type: 'string-from-int',
  kind: 'array',
}

The fields will appear and act as native arrays.

[runspired]

In follow up we should add tests around recoverability/behavior if the transform errors on item insertion / an out-of-bounds index set or length set occurs.