chore: move the go code into a subfolder

apps/api/internal/eventstore/handler/v2/state_get.sql

@@ -0,0 +1,13 @@
+SELECT
+    aggregate_id
+    , aggregate_type
+    , "sequence"
+    , event_date
+    , "position"
+    , filter_offset
+FROM 
+    projections.current_states
+WHERE
+    instance_id = $1
+    AND projection_name = $2
+FOR UPDATE NOWAIT;