chore(deploy): drop the AWS golden-image build stack

Remove the release-driven Packer AMI/qcow2 pipeline and everything that existed only to feed it: the image.yml workflow, deploy/packer, deploy/lightsail, deploy/firstboot, the AWS Marketplace checklist, and the first-boot smoke test/job.

Keep the cloud-agnostic unattended-install path (cloud-init + install.sh non-interactive) and the Hetzner notes, which never depended on the workflow. Hetzner's snapshot path is dropped too since it relied on firstboot to avoid admin/admin on clones; cloud-init regenerates per-instance credentials on its own.

Update deploy/README, the cloud-init and Hetzner docs, the root README plus its six translations, and .gitattributes to match.

README.md

@@ -89,17 +89,15 @@ During installation a random username, password, and access path are generated.
 
 For full documentation, please visit the [project Wiki](https://github.com/MHSanaei/3x-ui/wiki).
 
-### Unattended install & cloud images
+### Unattended install
 
-The installer also runs **non-interactively** for cloud-init and golden images.
+The installer also runs **non-interactively** for cloud-init.
 Set `XUI_NONINTERACTIVE=1` (or pipe with no TTY) and it installs end-to-end with
 zero prompts, generating random credentials and writing them to
 `/etc/x-ui/install-result.env`. See [`deploy/`](deploy/) for:
 
 - [Cloud-init user-data](deploy/cloud-init/) — unattended install on any cloud (Hetzner/AWS/DO/Vultr/GCP/Azure/Oracle)
-- [Packer golden image](deploy/packer/) — build an AWS EC2 AMI + qcow2 (amd64/arm64) with per-instance credentials generated on first boot
-- [Amazon Lightsail](deploy/lightsail/) — launch script + reusable snapshot builder
-- [AWS Marketplace checklist](deploy/marketplace/aws/)
+- [Hetzner Cloud notes](deploy/marketplace/hetzner/) — cloud-init deployment on Hetzner
 
 ## Supported Platforms