feat(core-flows,typers,utils,medusa): add payment auth step to complete cart workflow - [complete cart part 3] (#7248)

* chore: authorize payment sessions for cart

* chore: add spec for cart returns

* fix: Correctly select fields for cart

* chore: fix specs + address comments

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Co-authored-by: Stevche Radevski <sradevski@live.com>
Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>
Co-authored-by: Carlos R. L. Rodrigues <37986729+carlos-r-l-rodrigues@users.noreply.github.com>
Co-authored-by: Carlos R. L. Rodrigues <rodrigolr@gmail.com>

.changeset/large-dots-beg.md

@@ -0,0 +1,8 @@
+---
+"@medusajs/core-flows": patch
+"@medusajs/types": patch
+"@medusajs/utils": patch
+"@medusajs/medusa": patch
+---
+
+feat(core-flows,typers,utils,medusa): add payment auth step to complete cart workflow