add libxml2 and fix build issues

[lucarin91]

The repository wasn't compiling anymore due to some updates in the Ubuntu image.
The core changes are:

• Fix build issue (in particular, using an older clang-13)
• Update libusb and libusb-compact
• Add libxml2library
• Add a configure_toolchain.sh script to easily select the toolchain to use
• Disable FTDI library for now

You can now select a cross compiler by setting the CROSS_COMPILE env variable, for instance

docker run -it --rm -e CROSS_COMPILE=aarch64-linux-gnu -v $PWD:/workdir ghcr.io/arduino/crossbuild:<version>

[Copilot]

Pull Request Overview

This PR updates the build environment by upgrading to libusb 1.0.28, adding libxml2, fixing Ubuntu build issues, and centralizing toolchain selection.

• Remove outdated MSVC project files and old libusb docs
• Update build_libs.sh to bump libusb/libusb-compat and add libxml2 build
• Introduce configure_toolchain.sh and switch Dockerfiles to Ubuntu 22.04 with clang-13

Reviewed Changes

Copilot reviewed 299 out of 299 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
deps/libusb-1.0.26/msvc/*	Remove legacy Visual Studio project and filter files
deps/libusb-1.0.26/libusb/*	Delete version_nano.h and darwin_usb.h (macOS backend)
deps/libusb-1.0.26/INSTALL	Remove detailed install instructions
deps/build_libs.sh	Bump libusb versions, comment out CMake step, add libxml2
configure_toolchain.sh	New script to set CC, CXX, and related toolchain vars
Taskfile.yml	Exclude deps/*, simplify shell-file detection
Dockerfile	Switch to Ubuntu 22.04, install clang-13, add symlinks

Comments suppressed due to low confidence (5)

deps/libusb-1.0.26/libusb/version_nano.h:1

• Removal of version_nano.h deletes the LIBUSB_NANO definition; any code checking this macro will now fail. Please update or replace this version constant to match the new libusb release.

#define LIBUSB_NANO 11724

deps/libusb-1.0.26/libusb/os/darwin_usb.h:1

• The entire Darwin USB backend header was removed, so any macOS builds will break due to missing darwin_usb.h. Restore this file or update the macOS build path accordingly.

/* darwin backend for libusb 1.0 */

deps/libusb-1.0.26/INSTALL:1

• [nitpick] The INSTALL file was deleted, removing valuable installation guidance. Consider keeping or relocating these instructions in a project-level docs/ directory.

Installation Instructions

Dockerfile:8

• Typo in comment: "Intall" should be "Install".

# Intall clang compiler used by macos

Taskfile.yml:118

• [nitpick] Combine the -name tests with -type using parentheses to ensure the intended precedence, e.g., ( -name '*.bash' -o -name '*.sh' ) -a -type f.

-                -name '*.bash' -or -name '*.sh' -and -type f