config: add global config with toggle to disable unlock for official vgpu cards

src/config.rs

@@ -0,0 +1,25 @@
+use serde::Deserialize;
+
+struct Defaults;
+
+impl Defaults {
+    #[inline]
+    const fn unlock() -> bool {
+        true
+    }
+}
+
+#[derive(Deserialize)]
+pub struct Config {
+    #[serde(default = "Defaults::unlock")]
+    pub unlock: bool,
+}
+
+impl Default for Config {
+    #[inline]
+    fn default() -> Self {
+        Self {
+            unlock: Defaults::unlock(),
+        }
+    }
+}