Add Phase 2 editor definitions for all core AST concepts
- Module editor: renders module signature and nested functions/variables
- Function editor: renders function signature with parameters, return type, and body
- Statement editors: Block, Assignment, IfStatement, WhileLoop, ForLoop, Return, ExpressionStatement
- Expression editors: BinaryOp, UnaryOp, FunctionCall, VariableReference, Literals, Collections, Access
- Type editors: PrimitiveType, ListType, OptionalType, CustomType
All editors support:
- Syntax highlighting with keyword rendering
- Proper indentation for nested structures
- Inline reference editing
- Horizontal and vertical layout as appropriate
Completes Phase 2 of Core AST Structure feature specification.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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