Feature/reorganise library

[humphrey-xmos]

Building host apps would require a lot of copy-paste, adding cmakes for variants to assist building specific host apps.

• Cmake now handles finding and linking libraries (SPI, USB, XSCOPE)
• Listing common include paths (HOST_CONTROL_INC)
• Listing per tarnsport includes, typcailly linked library headers (HOST_xxx_INCLUDES {USB, XSCOPE, SPI})

Plus,

• Moved header files in src folder to inc
• Moved host source from lib_device_control/host/ to host/
• Moved examples' "shared" resources to shared folder (were duplicated).
• Extracted USB transport to library functions from endpoint0, created transport_usb.xc

[Copilot]

Pull request overview

This PR reorganizes the lib_device_control library structure to simplify building host applications across different transport mechanisms (USB, SPI, I2C, XSCOPE). The reorganization eliminates code duplication and provides CMake infrastructure for easier integration.

Key changes:

• New CMake files handle transport-specific library discovery and linking
• Header files moved from src/ to inc/ directory for clearer separation
• Host source code relocated from lib_device_control/host/ to dedicated host/ directory
• Transport-specific USB implementation added with proper abstractions

Reviewed changes

Copilot reviewed 42 out of 63 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
lib_device_control/transport/transport_usb.xc	New USB transport implementation for device side
lib_device_control/inc/transport_usb.h	New header for USB transport with documentation issues
lib_device_control/inc/control_transport_shared.h	New shared transport definitions and constants
lib_device_control/lib_build_info.cmake	Updated to support conditional transport source inclusion
lib_device_control/module_build_info	Updated include paths for reorganized structure
lib_device_control/api/control.h	Added interface array macros for XC/C compatibility
lib_device_control/api/control_shared.h	Added guard for CONTROL_VENDOR_REQUEST definition
host/src/*.c	New host implementation files for different transports
host/inc/util.h	New utility header for host applications
host/api/control_host*.h	New host API headers
host/host_build_*.cmake	New CMake files for transport-specific builds
tests/i2c_end_to_end_sim/CMakeLists.txt	Updated paths for reorganized host sources
examples/xscope/src/main.xc	Fixed variable scope and spelling
examples/xscope/src/app.*	Added missing resource header include
examples/usb/src/app.xc	Added missing config header include

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