Add late-load.sh for KernelSU LKM late-load mode

[Nikj-Fr]

Add late-load.sh for KernelSU LKM late-load (jailbreak mode)

Summary

• Add module/src/late-load.sh for KernelSU ksud late-load / LKM jailbreak mode
• Package late-load.sh in customize.sh and module/build.gradle.kts
• Document late-load behavior in README

Why

KernelSU LKM setups load kernelsu.ko after the system has booted (ksud late-load). In this mode, post-fs-data.sh is never run — only late-load.sh (KernelSU module docs).

NeoZygisk currently has no late-load.sh, so users on jailbreak-style KernelSU installs get no Zygisk injection until they manually run post-fs-data.sh and restart zygote.

This PR ships that workflow:

1. Bootstrap NeoZygisk via post-fs-data.sh if the ptrace monitor is not running
2. Soft-reboot zygote (killall zygote64 zygote) so new processes receive injection

Test plan

• Cold boot without jailbreak: NeoZygisk inactive (expected)
• Tap 越狱 (ksud late-load): late-load.sh runs, monitor starts
• Module status shows ptrace monitor / injection active after zygote restart
• Zygisk-dependent modules (e.g. Vector) work in newly started apps

Notes

• late-load.sh only runs during KernelSU late-load; normal boot still uses post-fs-data.sh
• Uses pidof instead of pgrep -f for toybox/busybox compatibility
• Intentionally avoids live zygisk-ptrace64 trace on a running zygote (can SIGKILL zygote on failure)

[JingMatrix]

It seems that pr #107 is more interesting regarding the late inject mode, where live-attach is applied.

I have a rough plan to somehow merge #107 while exploiting KSU's new mode.