refactor: rework init

src/ex/init.zig

@@ -0,0 +1,15 @@
+const std = @import("std");
+const b = @import("base");
+const pl = b.pl;
+const ke = b.ke;
+
+pub fn init(boot_info: *pl.BootInfo) void {
+    _ = boot_info;
+
+    pl.late_init();
+    ke.sched.late_init();
+
+    while (true) {
+        std.atomic.spinLoopHint();
+    }
+}

src/ex/private.zig

@@ -0,0 +1,3 @@
+pub const init_mod = @import("init.zig");
+
+pub const init = init_mod.init;

src/ex/root.zig

@@ -1 +1,2 @@
 pub const fireworks = @import("fireworks.zig");
+pub const private = @import("private.zig");