fix(selfhost): generic struct compilation, explicit generic args, method calls, field access
- parser: add parserIsTypeArgListAhead() for Func<Type>(args) and Type<T> { ... }
- hir_lower: method call desugaring with typeName tracking, self keyword,
ekField typeName propagation, variable type tracking, strip '*' suffix
from pointer type names in method calls, fix externFuncs buffer overflow
(64 -> 256 elements) that corrupted structCount
- qbe_backend: QBE_FindStruct, QBE_FieldOffset, QBE_TypeSize helpers;
hStructInit field-by-field codegen; hFieldPtr with offset + auto-load;
hAssign/hStore special case for hFieldPtr (generate pointer, not value);
fix null as *HirNode -> null as *void for extraData comparisons
dimgigov
f0f94f30e1