move vm_path and dll loading into cdll.py

define binds explicitly in Binds.

bump to version 0.3

addon/globalPlugins/voicemeeter/error.py

@@ -1,2 +1,11 @@
 class VMError(Exception):
-    """Base VMError class"""
+    """Base voicemeeterlib exception class."""
+
+
+class VMCAPIError(VMError):
+    """Exception raised when the C-API returns an error code"""
+
+    def __init__(self, fn_name, code):
+        self.fn_name = fn_name
+        self.code = code
+        super().__init__(f"{self.fn_name} returned {self.code}")