feat(parser): add action parameters, repeater decorator, and named participants

Add syntax enhancements for more expressive behavior trees and relationships.

Action parameters:
- Support typed/positional parameters: WaitDuration(2.0)
- Support named parameters: SetValue(field: value)
- Enable inline values without field names

Repeater decorator:
- Add * { node } syntax for repeating behavior nodes
- Maps to Decorator("repeat", node)

Named participant blocks:
- Replace self/other blocks with named participant syntax
- Support multi-party relationships
- Example: Alice { role: seeker } instead of self { role: seeker }

Schedule block syntax:
- Require braces for schedule blocks to support narrative fields
- Update tests to use new syntax: 04:00 -> 06:00: Activity { }

src/types.rs

@@ -45,6 +45,7 @@ pub enum ResolvedDeclaration {
 #[derive(Debug, Clone, PartialEq)]
 pub struct ResolvedCharacter {
     pub name: String,
+    pub species: Option<String>,
     pub fields: HashMap<String, Value>,
     pub prose_blocks: HashMap<String, ProseBlock>,
     pub span: Span,