refactor(lexer): rename value type tokens for v0.3

Renamed lexer tokens to align with new v0.3 naming convention:
- IntLit -> NumberLit
- FloatLit -> DecimalLit
- StringLit -> TextLit

Updated all references across parser grammar, property tests,
and editor highlighting.

storybook-editor/src/highlighter.rs

@@ -89,9 +89,9 @@ impl iced::widget::text::Highlighter for StorybookHighlighter {
                 match &token {
                     | Token::Colon => after_colon = true,
                     | Token::Ident(_) |
-                    Token::IntLit(_) |
-                    Token::FloatLit(_) |
-                    Token::StringLit(_) |
+                    Token::NumberLit(_) |
+                    Token::DecimalLit(_) |
+                    Token::TextLit(_) |
                     Token::True |
                     Token::False |
                     Token::TimeLit(_) |

storybook-editor/src/syntax_highlight.rs

@@ -88,10 +88,10 @@ pub fn token_to_color(token: &Token) -> Color {
         | Token::Ident(_) => Color::from_rgb8(0x50, 0xfa, 0x7b), // Bright green
 
         // Number literals - Bright Purple
-        | Token::IntLit(_) | Token::FloatLit(_) => Color::from_rgb8(0xbd, 0x93, 0xf9), /* Light purple */
+        | Token::NumberLit(_) | Token::DecimalLit(_) => Color::from_rgb8(0xbd, 0x93, 0xf9), /* Light purple */
 
-        // String literals - Vibrant Yellow/Gold
-        | Token::StringLit(_) => Color::from_rgb8(0xf1, 0xfa, 0x8c), // Bright yellow
+        // Text literals - Vibrant Yellow/Gold
+        | Token::TextLit(_) => Color::from_rgb8(0xf1, 0xfa, 0x8c), // Bright yellow
 
         // Time/duration literals - Bright Teal
         | Token::TimeLit(_) | Token::DurationLit(_) => Color::from_rgb8(0x66, 0xd9, 0xef), /* Bright teal */
@@ -193,12 +193,12 @@ mod tests {
 
         // Strings should be green
         assert_eq!(
-            token_to_color(&Token::StringLit("test".to_string())),
+            token_to_color(&Token::TextLit("test".to_string())),
             Semantic::SUCCESS
         );
 
         // Numbers should be gold (lighter)
-        assert_eq!(token_to_color(&Token::IntLit(42)), Gold::_400);
+        assert_eq!(token_to_color(&Token::NumberLit(42)), Gold::_400);
 
         // Identifiers should be warm gray
         assert_eq!(