Adding gender to the config

interpreter/src/reading_io.h

@@ -16,10 +16,13 @@
  * significance.c), out->natal.bodies[]/out->transits.bodies[] (sign +
  * house per body, used only for display), out->spread.positions[]
  * (card + reversed per Celtic Cross position, used only by
- * guidance.c), and out->utc_moment (the top-level "date" field, parsed
+ * guidance.c), out->utc_moment (the top-level "date" field, parsed
  * back to midnight UTC of that date - used only for display, e.g. main.c
- * printing which day a reading is for). out->natal.ascendant_longitude/
- * houses[] are left zeroed - nothing reads them yet.
+ * printing which day a reading is for), and out->gender (the top-level
+ * "gender" field - used only for the Celtic Cross position text's
+ * pronouns, e.g. tarot_position_name()/tarot_position_description()).
+ * out->natal.ascendant_longitude/houses[] are left zeroed - nothing
+ * reads them yet.
  *
  * Returns false on malformed JSON, or if "transits"."aspects" isn't
  * present as an array (an empty array is fine - that's a real "no