ENH: Transition build system from shell scripts to consolidated Python scripts

Replaces the primary build orchestration layer with a Python-based system.
Adds core abstractions including BuildManager for step-wise build
persistence/resumption, CMakeArgumentBuilder for managing CMake definitions,
cross-platform venv utilities, subprocess helpers, and pixi environment
integration. Establishes platform-specific base classes that Linux, macOS,
and Windows implementations extend. Restructures CMake layout into modular
BuildWheelsSupport and SuperbuildSupport components. Shell scripts remain
where still required.

Co-authored-by: Hans J. Johnson <hans-johnson@uiowa.edu>

Author: CavRiley

BuildWheelsSupport/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.26.6 FATAL_ERROR)
+# NOTE: 3.26.6 is the first cmake version to support Development.SABIModule
+
+project(ITKPythonPackageWheels CXX)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../cmake/ITKPythonPackage_Utils.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../cmake/ITKPythonPackage_BuildWheels.cmake)

LICENSE BuildWheelsSupport/LICENSELICENSE renamed to BuildWheelsSupport/LICENSE

@@ -4,4 +4,4 @@ itk-io
 itk-filtering
 itk-registration
 itk-segmentation
-itk-meta
+itk-meta