feat(type-system): implement concept_comparison with pattern matching

Added complete support for the new type system syntax including:

- concept: Base type declarations
- sub_concept: Enum and record sub-type definitions
- concept_comparison: Compile-time pattern matching with conditional guards

Parser changes:
- Added VariantPattern, FieldCondition, and Condition AST nodes
- Implemented "is" keyword for pattern matching (e.g., "CupType is Glass or CupType is Plastic")
- Added Value::Any variant to support universal type matching
- Disambiguated enum-like vs record-like sub_concept syntax

LSP updates:
- Added Value::Any match arms across code_actions, completion, hover, inlay_hints, and semantic_tokens
- Type inference and formatting support for Any values

Example fixes:
- Fixed syntax error in baker-family behaviors (missing closing brace in nested if)
- Removed deprecated core_enums.sb file

src/lsp/tests.rs

@@ -12,15 +12,8 @@ species Human {
     lifespan: 80
 }
 
-enum Mood {
-    Happy,
-    Sad,
-    Angry
-}
-
 character Alice: Human {
     age: 7
-    mood: Happy
     ---backstory
     A curious girl who loves adventures
     ---
@@ -122,7 +115,6 @@ mod document_tests {
         assert!(doc.name_table.resolve_name("Growing").is_some());
         assert!(doc.name_table.resolve_name("DailyRoutine").is_some());
         assert!(doc.name_table.resolve_name("Human").is_some());
-        assert!(doc.name_table.resolve_name("Mood").is_some());
         assert!(doc.name_table.resolve_name("Friendship").is_some());
     }
 
@@ -399,7 +391,6 @@ mod symbols_tests {
         assert!(symbols.iter().any(|s| s.name == "Growing"));
         assert!(symbols.iter().any(|s| s.name == "DailyRoutine"));
         assert!(symbols.iter().any(|s| s.name == "Human"));
-        assert!(symbols.iter().any(|s| s.name == "Mood"));
         assert!(symbols.iter().any(|s| s.name == "Friendship"));
     }
 
@@ -432,9 +423,6 @@ mod symbols_tests {
 
         let child = symbols.iter().find(|s| s.name == "Child").unwrap();
         assert_eq!(child.kind, SymbolKind::INTERFACE);
-
-        let mood = symbols.iter().find(|s| s.name == "Mood").unwrap();
-        assert_eq!(mood.kind, SymbolKind::ENUM);
     }
 
     #[test]