Proxmox-LXC Plugin Community Integration Request

#### Description

A HashiCorp Packer plugin for building LXC container templates on Proxmox VE. This plugin allows you to create reusable LXC templates from a local machine by connecting to a Proxmox host via SSH.
Link [here](https://github.com/leoarry/packer-plugin-proxmox-lxc)

#### Integration Tier

community

#### Checklist
- [x] Has valid [`metadata.hcl`](https://github.com/hashicorp/integration-template) file in plugin repository.
- [x] Has added integration scripts [packer-plugin-scaffolding](https://github.com/hashicorp/packer-plugin-scoffolding) to plugin repository.
- [x] Has added top-level integration README.md file to plugin `docs` directory.
- [x] All plugins components have one README.md describing their usage.
- [x] Has a fully synced `.web-docs` directory ready for publishing to the integrations portal.