Add ChangeSet for createDataStoreAlias (microsoft#19471)

Adds changeset for
[AB#7082](https://dev.azure.com/fluidframework/internal/_workitems/edit/7082)
and
[AB#6725](https://dev.azure.com/fluidframework/internal/_workitems/edit/6725)

Changeset detailing the deprecation of
`PureDataObjectFactory.createRootInstance` and adding
`PureDataObjectFactory.createInstanceWithDataStore`

.changeset/angry-clubs-play.md

@@ -0,0 +1,29 @@
+---
+"@fluidframework/aqueduct": minor
+---
+
+## Overview
+
+-   Deprecated `PureDataObjectFactory.createRootInstance`
+-   Added `PureDataObjectFactory.createInstanceWithDataStore`
+
+## Details
+
+### Deprecated PureDataObjectFactory.createRootInstance
+
+This was done as `PureDataObjectFactory.createRootInstance` has an issue at scale.
+`PureDataObjectFactory.createRootInstance` used the old method of creating `PureDataObject`s with names. The issue was
+that simultaneous creations could happen, and the old api had no good way of dealing with those types of collisions.
+This version slightly improved it by resolving those collisions by assuming whatever datastore was created with the
+alias or `rootDataStoreId` would just return that datastore. This will work for developers who expect the same type of
+`PureDataObject` to be returned from the `createRootInstance` api, but if a potentially different `PureDataObject`
+would be returned, then this api would give you the wrong typing.
+
+For a replacement api please view [PureDataObjectFactory.createInstanceWithDataStore](#Added-PureDataObjectFactory.createInstanceWithDataStore).
+
+### Added PureDataObjectFactory.createInstanceWithDataStore
+
+This was done as a replacement of `PureDataObjectFactory.createRootInstance`. This exposes the `IDataStore` interface
+in the form of `[PureDataObject, IDataStore]`. `IDataStore` provides the opportunity for developers to use the
+`IDataStore.trySetAlias` method. This can return 3 different scenarios `Success`, `Conflict`, or `AlreadyAliased`.
+These scenarios can allow the developer to handle conflicts as they wish.