feat(grammar): add type system nodes to tree-sitter

Added grammar rules for v0.3 type system declarations:
- concept_declaration: semicolon-terminated base type
- sub_concept: enum and record forms with dot notation
- concept_comparison: nested pattern matching with variant_pattern
- any_type: named node for the 'any' keyword
- template species extension: optional ': Species' syntax

Updated query files:
- highlights.scm: new keywords and named field highlights
- outline.scm: concept/sub_concept/concept_comparison in outline
- indents.scm: indentation for new brace-delimited nodes

Fixed pre-existing query issues:
- Replaced invalid repeat_node reference with decorator_node
- Removed invalid '?' punctuation reference

Added comprehensive test corpus (type_system.txt) covering:
- concept declaration (simple and multiple)
- sub_concept enum and record forms
- concept_comparison with any/is conditions
- template with species extension
- full combined example

tree-sitter-storybook/queries/highlights.scm

@@ -18,6 +18,9 @@
   "species"
   "enum"
   "state"
+  "concept"
+  "sub_concept"
+  "concept_comparison"
 ] @keyword.declaration
 
 ; Keywords - Control flow and modifiers
@@ -45,6 +48,7 @@
   "remove"
   "append"
   "is"
+  "any"
 ] @keyword.special
 
 ; Boolean literals
@@ -74,9 +78,16 @@
 (species name: (identifier) @type.species)
 (enum_declaration name: (identifier) @type.enum)
 (arc_state name: (identifier) @type.state)
+(concept_declaration name: (identifier) @type.concept)
+(sub_concept parent: (identifier) @type.concept)
+(sub_concept name: (identifier) @type.sub_concept)
+(concept_comparison name: (identifier) @type.concept_comparison)
+(variant_pattern name: (identifier) @type.variant)
+(template species: (identifier) @type.builtin)
 
 ; Field names
 (field name: (dotted_path) @property)
+(sub_concept_field name: (identifier) @property)
 
 ; Species reference
 (character species: (identifier) @type.builtin)
@@ -124,14 +135,10 @@
   "."
   ".."
   "*"
-  "?"
   "@"
 ] @punctuation.delimiter
 
 ; Behavior tree nodes
-(selector_node "?" @keyword.behavior.selector)
-(sequence_node ">" @keyword.behavior.sequence)
-(repeat_node "*" @keyword.behavior.repeat)
 (action_node (identifier) @function.action)
 
 ; Transitions

tree-sitter-storybook/queries/indents.scm

@@ -38,8 +38,12 @@
   (enum_declaration)
   (selector_node)
   (sequence_node)
-  (repeat_node)
+  (decorator_node)
+  (sub_concept)
+  (concept_comparison)
+  (variant_pattern)
 ] @indent.begin
 
 ; Dedent after semicolon at top level
 (use_declaration ";" @indent.end)
+(concept_declaration ";" @indent.end)

tree-sitter-storybook/queries/outline.scm

@@ -55,3 +55,18 @@
 (enum_declaration
   name: (identifier) @name
 ) @symbol.enum
+
+; Concepts
+(concept_declaration
+  name: (identifier) @name
+) @symbol.concept
+
+; Sub-concepts
+(sub_concept
+  name: (identifier) @name
+) @symbol.sub_concept
+
+; Concept comparisons
+(concept_comparison
+  name: (identifier) @name
+) @symbol.concept_comparison