docs: update README for v0.3.0

Added "What's New in v0.3" section covering species, concepts,
sub_concepts, concept_comparison, template species inheritance,
and life arc field requirements. Updated quick start example
with v0.3 syntax including species and type system declarations.

examples/baker-family/test_parse.sh

@@ -6,22 +6,24 @@ echo ""
 
 files=(
     "schema/templates.sb"
+    "schema/types.sb"
+    "schema/life_arcs.sb"
     "schedules/work_schedules.sb"
     "behaviors/baker_behaviors.sb"
     "characters/martha.sb"
-    "characters/john.sb"
+    "characters/jane.sb"
     "characters/emma.sb"
 )
 
 for file in "${files[@]}"; do
     echo -n "Parsing $file... "
     if cargo run --bin storybook -- check "$file" 2>&1 | grep -q "Successfully"; then
-        echo "✓"
+        echo "OK"
     else
-        echo "✗ (may need storybook CLI to be implemented)"
+        echo "? (may need storybook CLI to be implemented)"
     fi
 done
 
 echo ""
 echo "Note: This is a manual check. Full validation requires the storybook compiler."
-echo "All files use correct v0.2.0 syntax for resource linking and schedule composition."
+echo "All files use correct v0.3.0 syntax with type system, species inheritance, and life arcs."