Add changesets for postgres type changes (#352)

Author: simolus3

.changeset/empty-spiders-carry.md

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+---
+'@powersync/service-module-postgres': patch
+'@powersync/service-sync-rules': patch
+'@powersync/service-image': patch
+---
+
+Add the `custom_postgres_types` compatibility option. When enabled, domain, composite, enum, range, multirange and custom array types will get synced in a JSON representation instead of the raw postgres wire format.

.changeset/tender-bulldogs-enjoy.md

@@ -0,0 +1,5 @@
+---
+'@powersync/service-jpgwire': minor
+---
+
+Add utilities for parsing serialized structures like compound types and arrays.