Changelog all remaining GDS Session features

Co-authored-by: Florentin Dörre <florentin.dorre@neotechnology.com>

changelog.md

@@ -8,6 +8,11 @@
 
 * Add the new concept of GDS Sessions, used to manage GDS computations in Aura, based on data from an AuraDB instance.
   * Add a new `gds.graph.project` endpoint to project graphs from AuraDB instances to GDS sessions.
+    * `nodePropertySchema` and `relationshipPropertySchema` can be used to optimise remote projections.
+  * Add a new top-level class `GdsSessions` to manage GDS sessions in Aura.
+    * `GdsSessions` support `get_or_create()`, `list()`, and `delete()`.
+  * Creating a new session supports various sizes.
+  * The `run_cypher()` method will run Cypher queries targetting the configured AuraDB instance.
 
 
 ## Bug fixes