host type injection

// Test 701: HostTypeDecl infrastructure
// This test verifies that the AST, emitter, and serializer support HostTypeDecl
// Actual injection of host types will be tested in Phase 2
const std = @import("std");

~event test_pass {}
| done {}

~proc test_pass {
    std.debug.print("HostTypeDecl infrastructure ready\n", .{});
    return .{ .done = .{} };
}

~test_pass()
| done |> _