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/resolve/types.rs

@@ -33,6 +33,7 @@ pub enum ResolvedDeclaration {
 #[derive(Debug, Clone)]
 pub struct ResolvedCharacter {
     pub name: String,
+    pub species: Option<String>,
     pub fields: Vec<Field>,
     pub span: Span,
     /// Qualified path (e.g., characters::Martha)

src/resolve/validate.rs

@@ -419,6 +419,7 @@ mod tests {
             states: vec![
                 ArcState {
                     name: "start".to_string(),
+                    on_enter: None,
                     transitions: vec![Transition {
                         to: "end".to_string(),
                         condition: Expr::Identifier(vec!["ready".to_string()]),
@@ -428,6 +429,7 @@ mod tests {
                 },
                 ArcState {
                     name: "end".to_string(),
+                    on_enter: None,
                     transitions: vec![],
                     span: Span::new(50, 100),
                 },
@@ -446,6 +448,7 @@ mod tests {
             name: "Test".to_string(),
             states: vec![ArcState {
                 name: "start".to_string(),
+                on_enter: None,
                 transitions: vec![Transition {
                     to: "nonexistent".to_string(),
                     condition: Expr::Identifier(vec!["ready".to_string()]),

src/resolve/validate_prop_tests.rs

@@ -161,6 +161,7 @@ proptest! {
             states: vec![
                 ArcState {
                     name: state1_name.clone(),
+                    on_enter: None,
                     transitions: vec![Transition {
                         to: state2_name.clone(),
                         condition: Expr::BoolLit(true),
@@ -170,6 +171,7 @@ proptest! {
                 },
                 ArcState {
                     name: state2_name,
+                    on_enter: None,
                     transitions: vec![],
                     span: Span::new(50, 100),
                 },