improves machine architecture check

Slightly refactors the code in core to enhance readability and simplify the logic for checking supported machine architectures

Author: ajyey

src/onepassword/core.py

@@ -2,16 +2,14 @@
 import platform
 
 
-if platform.machine().lower() == "x86_64" or platform.machine().lower() == "amd64":
+machine_arch = platform.machine().lower()
+
+if machine_arch in ["x86_64", "amd64"]:
     import onepassword.lib.x86_64.op_uniffi_core as core
-elif platform.machine().lower() == "aarch64" or platform.machine().lower() == "arm64":
+elif machine_arch in ["aarch64", "arm64"]:
     import onepassword.lib.aarch64.op_uniffi_core as core
 else:
-    raise ImportError(
-        "your machine's architecture is not currently supported: {}".format(
-            platform.machine()
-        )
-    )
+    raise ImportError(f"Your machine's architecture is not currently supported: {machine_arch}")
 
 
 # InitClient creates a client instance in the current core module and returns its unique ID.