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/document_edge_tests.rs

@@ -116,7 +116,6 @@ character Alice { age: 8 }
 species Human {}
 character Alice: Human {}
 template Child {}
-enum Mood { Happy, Sad }
 location Home {}
 relationship Friends { Alice as friend {} Bob as friend {} }
 "#;
@@ -125,7 +124,6 @@ relationship Friends { Alice as friend {} Bob as friend {} }
         assert!(doc.name_table.resolve_name("Human").is_some());
         assert!(doc.name_table.resolve_name("Alice").is_some());
         assert!(doc.name_table.resolve_name("Child").is_some());
-        assert!(doc.name_table.resolve_name("Mood").is_some());
         assert!(doc.name_table.resolve_name("Home").is_some());
         assert!(doc.name_table.resolve_name("Friends").is_some());
     }