fix: fallback to python wheel if Nuitka is not available

Plugins/cmake/zshell-cli-python.cmake.in

@@ -0,0 +1,19 @@
+file(GLOB ZSHELL_CLI_WHEEL "@ZSHELL_CLI_DIST_DIR@/*.whl")
+if(NOT ZSHELL_CLI_WHEEL)
+	message(FATAL_ERROR "No zshell-cli wheel found in @ZSHELL_CLI_DIST_DIR@")
+endif()
+
+set(_zshell_installer_args "--prefix=@CMAKE_INSTALL_PREFIX@")
+if(DEFINED ENV{DESTDIR} AND NOT "$ENV{DESTDIR}" STREQUAL "")
+	list(APPEND _zshell_installer_args "--destdir=$ENV{DESTDIR}")
+endif()
+
+execute_process(
+	COMMAND "@Python3_EXECUTABLE@" -m installer
+		${_zshell_installer_args}
+		${ZSHELL_CLI_WHEEL}
+	RESULT_VARIABLE ZSHELL_CLI_INSTALL_RESULT
+)
+if(NOT ZSHELL_CLI_INSTALL_RESULT EQUAL 0)
+	message(FATAL_ERROR "zshell-cli wheel install failed")
+endif()