improve code readability with detailed inline comments

Author: midhunsai31

_build_backend/backend.py

@@ -2,11 +2,13 @@
 # This allows us to extend or override its functionality where needed
 from setuptools import build_meta as _orig
 
+# Re-use the default implementations for standard PEP 517 hook methods
 prepare_metadata_for_build_wheel = _orig.prepare_metadata_for_build_wheel
 build_wheel = _orig.build_wheel
 build_sdist = _orig.build_sdist
 get_requires_for_build_sdist = _orig.get_requires_for_build_sdist
 
+# Override the `get_requires_for_build_wheel` function to add dynamic dependency logic
 def get_requires_for_build_wheel(config_settings=None):
     from packaging import version
     from skbuild.exceptions import SKBuildError
@@ -15,11 +17,13 @@ def get_requires_for_build_wheel(config_settings=None):
     # check if system cmake can be used if present
     # if not, append cmake PyPI distribution to required packages
     # scikit-build>=0.18 itself requires cmake 3.5+
+    # Define the minimum required version of CMake (needed by scikit-build>=0.18)
     min_version = "3.5"
     try:
         if version.parse(get_cmake_version().split("-")[0]) < version.parse(min_version):
             packages.append(f'cmake>={min_version}')
     except SKBuildError:
         packages.append(f'cmake>={min_version}')
 
+# Return the final list of required packages for building the wheel
     return packages