feat(examples): expand baker-family with relationships and world context

Added comprehensive v0.3.0 feature demonstration:

Characters (5 total):
- Martha & Jane (married lesbian couple, co-owners of bakery)
- Emma (their daughter, apprentice baker)
- Henry (loyal customer, retired teacher)
- Roland (competing baker)

New declarations:
- 6 relationships with asymmetric perspectives (Marriage, ParentChild×2,
  BusinessPartnership, CustomerRelationship, Competition)
- Locations with prose (MarthasBakery, MainStreet)
- Institution (BakersGuild)
- Life arcs (MarriageQuality, BusinessGrowth)

Features demonstrated:
- Concept comparison usage (skill_tier: Master/Journeyman)
- Life arc applied to relationship
- Asymmetric participant perspectives
- Family coherence across files

examples/baker-family/test_parse.sh

@@ -13,6 +13,12 @@ files=(
     "characters/martha.sb"
     "characters/jane.sb"
     "characters/emma.sb"
+    "characters/henry.sb"
+    "characters/roland.sb"
+    "relationships/baker_family_relationships.sb"
+    "locations/bakery_locations.sb"
+    "institutions/bakers_guild.sb"
+    "life_arcs/family_life_arcs.sb"
 )
 
 for file in "${files[@]}"; do
@@ -26,4 +32,4 @@ done
 
 echo ""
 echo "Note: This is a manual check. Full validation requires the storybook compiler."
-echo "All files use correct v0.3.0 syntax with type system, species inheritance, and life arcs."
+echo "All files use correct v0.3.0 syntax with type system, relationships, locations, and life arcs."