docs: update type terminology from Int/Float/String/Bool to Number/Decimal/Text/Boolean

docs/tutorial/01-welcome.md

@@ -71,9 +71,9 @@ life_arc Career { ... }       // How someone changes over time
 Fields use a simple `name: value` format:
 
 ```storybook
-age: 34                  // Integer
-skill_level: 0.95        // Float
-name: "Martha Baker"     // String
+age: 34                  // Number
+skill_level: 0.95        // Decimal
+name: "Martha Baker"     // Text
 is_open: true            // Boolean
 wake_time: 04:30         // Time
 bake_duration: 45m       // Duration