feat: minimal virtual machine / runtime port from ink-c

src/AstGen.zig

@@ -0,0 +1,8 @@
+const std = @import("std");
+const Ast = @import("./Ast.zig");
+const Story = @import("./Story.zig");
+
+/// Perform code generation via tree-walk.
+pub fn generate(_: std.mem.Allocator, _: *const Ast) !Story {
+    return error.OutOfMemory;
+}