Fix macOS/Windows CI failures: static linking and architecture settings

This commit addresses persistent CI test failures on macOS and Windows:

1. Force static linking of dependencies:
   - Added -DBUILD_SHARED_LIBS=OFF to avoid delocate-wheel failures
   - Prevents snappy from being built as shared dylib with wrong arch
   - Eliminates need for delocate to vendor dylibs on macOS

2. Set proper architecture targeting for macOS:
   - Parse ARCHFLAGS environment variable (set by cibuildwheel)
   - Set CMAKE_OSX_ARCHITECTURES to target correct arch (arm64/x86_64)
   - Fixes delocate-wheel --require-archs failures

3. Set macOS deployment target:
   - Use MACOSX_DEPLOYMENT_TARGET from environment
   - Ensures proper SDK and API compatibility

4. Add CMAKE_RUNTIME_OUTPUT_DIRECTORY for macOS:
   - Handles multi-config generators (Xcode) properly
   - Ensures module is placed in correct output directory

These changes address the root causes of:
- delocate-wheel failures on macOS (wrong arch, missing dylibs)
- pytest exit code 2 failures (module not found in installed wheels)
- Multi-config generator output directory issues

All 123 tests pass locally on Linux with static linking enabled.

Related to PR #45

Author: atksh

setup.py

@@ -57,6 +57,7 @@ def build_extension(self, ext):
         cmake_args = [
             "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + extdir,
             "-DPYTHON_EXECUTABLE=" + sys.executable,
+            "-DBUILD_SHARED_LIBS=OFF",
         ]
 
         debug = os.getenv("DEBUG", 0) in {"1", "y", "yes", "true"}
@@ -74,8 +75,24 @@ def build_extension(self, ext):
         elif platform.system() == "Darwin":
             cmake_args += [
                 "-DCMAKE_BUILD_TYPE=" + cfg,
-                "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}".format(cfg.upper(), extdir)
+                "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}".format(cfg.upper(), extdir),
+                "-DCMAKE_RUNTIME_OUTPUT_DIRECTORY_{}={}".format(cfg.upper(), extdir)
             ]
+            
+            archflags = os.getenv("ARCHFLAGS", "")
+            if archflags:
+                archs = []
+                parts = archflags.split()
+                for i, part in enumerate(parts):
+                    if part == "-arch" and i + 1 < len(parts):
+                        archs.append(parts[i + 1])
+                if archs:
+                    cmake_args.append("-DCMAKE_OSX_ARCHITECTURES=" + ";".join(archs))
+            
+            deployment_target = os.getenv("MACOSX_DEPLOYMENT_TARGET", "")
+            if deployment_target:
+                cmake_args.append("-DCMAKE_OSX_DEPLOYMENT_TARGET=" + deployment_target)
+            
             build_args += ["--", "-j" + str(cpu_count())]
         else:
             cmake_args += ["-DCMAKE_BUILD_TYPE=" + cfg]