feat(core-flows,medusa,types,utils): rename psma to prices (#6796)

What:

Renames pricesetmoneyamount to prices

Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>

.changeset/old-knives-guess.md

@@ -0,0 +1,8 @@
+---
+"@medusajs/core-flows": patch
+"@medusajs/medusa": patch
+"@medusajs/types": patch
+"@medusajs/utils": patch
+---
+
+feat(core-flows,medusa,types,utils): rename psma to prices