feat: allow disabling the sliding of screens back and forth (#20)

fix: sliding screens with smooth trackpad scrolling
knuckles smooth trackpad scrolling can return NaN

src/config.rs

@@ -150,6 +150,9 @@ pub struct GeneralConfig {
 
     #[serde(default = "def_half")]
     pub xr_alt_click_sensitivity_release: f32,
+
+    #[serde(default = "def_true")]
+    pub allow_sliding: bool,
 }
 
 impl GeneralConfig {