Adding cross-library support for DFU

[humphrey-xmos]

Adds dfu_control_server for lib_device_control interface to lib_dfu
Adds optional header control_default_conf.h and control_default_dfu_conf.h
Replaced CMake device build selection parameters with optional header defines (same as host).

[Copilot]

Pull request overview

This pull request adds cross-library support for Device Firmware Update (DFU) functionality to lib_device_control, enabling integration with lib_dfu. It introduces a new DFU control server that implements the control interface to handle DFU commands over various transport protocols (I2C, USB, SPI, XSCOPE).

Changes:

• Added dfu_control_server implementation that wraps DFU API calls in the control interface protocol
• Introduced CONTROL_CMD_VALUE macro to extract command values by clearing the read/write bit
• Added optional configuration header mechanism for DFU resource ID customization

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
lib_device_control/lib_build_info.cmake	Conditionally includes dfu_control_server.xc when CONTROL_APP_DFU is set and declares control_dfu_conf.h as optional header
lib_device_control/inc/dfu_control_server.h	Declares the dfu_control_server function that implements the control interface for DFU
lib_device_control/inc/control_transport_shared.h	Adds CONTROL_CMD_VALUE macro to extract command value by masking out read/write bit
lib_device_control/inc/control_default_dfu_conf.h	Provides default RESOURCE_ID_DFU definition with optional override mechanism
lib_device_control/apps/dfu_control_server.xc	Implements DFU control server that translates control interface calls to DFU API requests with custom header handling
lib_device_control/api/control.h	Includes control_default_dfu_conf.h to make DFU resource ID available

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