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

examples/baker-family/behaviors/baker_behaviors.sb

@@ -29,7 +29,7 @@ behavior PrepKitchen {
 }
 
 // type
-concept Vendor;
+concept Vendor
 
 // type
 sub_concept VendorInventory {
@@ -40,17 +40,17 @@ sub_concept VendorInventory {
 }
 
 // type (but really just an enum lol)
-concept Cup;
+concept Cup
 
 // enum
-sub_concept CupSize: {
+sub_concept CupSize {
     Small,
     Medium,
     Large
 }
 
 // enum
-sub_concept CupType: {
+sub_concept CupType {
     Ceramic,
     Glass,
     Plastic
@@ -83,7 +83,7 @@ concept_comparison CustomerInterestInCups {
 }
 
 // type
-concept Plate;
+concept Plate
 
 // enum
 sub_concept PlateColor {
@@ -93,7 +93,7 @@ sub_concept PlateColor {
 }
 
 // type
-concept Customer;
+concept Customer
 
 // enum
 sub_concept CustomerInterest {
@@ -113,9 +113,10 @@ behavior SellAtMarket {
                 make_sale(Cup)
             }
             if(CustomerInterestInCups.Interested.CupSize is Small and CustomerInterestInCups.Interested.CupType is Ceramic and CustomerInterestInCups.Interested.CupColor is Green) {
-            if (Plate.PlateColor is Blue or PlateColor is Green) {
-                // variadic arguments
-                make_sale(Cup, Plate)
+                if (Plate.PlateColor is Blue or PlateColor is Green) {
+                    // variadic arguments
+                    make_sale(Cup, Plate)
+                }
             }
             // or there can be generic fallthroughs too
             thank_customer
@@ -144,7 +145,7 @@ behavior QuickPrep {
     }
 }
 
-concept Hunger;
+concept Hunger
 
 sub_concept HungerState {
     Hungry,