Add role for xspress3

[jwlodek]

TODO: need to test with the xspress3 mini in the lab.

[Copilot]

Pull Request Overview

This PR adds comprehensive Ansible role support for the xspress3 detector system. The implementation includes module configuration, device role templates, and deployment configuration for managing xspress3 IOC instances.

• Creates complete xspress3 device role with EPICS templates and configuration files
• Adds module dependency definition for xspress3 version 911d16d
• Provides deployment configuration with device-specific environment variables and PV settings

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
roles/install_module/vars/xspress3_911d16d.yml	Defines module dependency configuration for xspress3
roles/device_roles/xspress3/templates/postInit.cmd.j2	Post-initialization command template with channel setup
roles/device_roles/xspress3/templates/base.cmd.j2	Base EPICS startup commands and driver configuration
roles/device_roles/xspress3/templates/auto_settings.req.j2	Autosave settings configuration for ROI statistics
roles/device_roles/xspress3/tasks/main.yml	Ansible tasks for installing xspress3 role files
roles/device_roles/xspress3/schema.yml	Schema validation for xspress3 configuration
roles/device_roles/xspress3/files/SetChannelValues.cmd	Channel-specific default value configuration
roles/device_roles/xspress3/files/DefineSCAROI.cmd	SCA and ROI plugin configuration per channel
roles/device_roles/xspress3/example.yml	Example configuration for xspress3 IOC
roles/device_roles/xspress3/README.md	Basic documentation for the xspress3 role
roles/deploy_ioc/vars/xspress3.yml	IOC deployment configuration with PV settings

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