chore: update documentation

plugins/os/src/error.rs

@@ -4,6 +4,9 @@
 
 use serde::{Serialize, Serializer};
 
+/// All errors that can occur while running the os plugin.
+///
+/// This enum currently has no variants: none of the plugin's commands can fail.
 #[derive(Debug, thiserror::Error)]
 pub enum Error {}
 

plugins/os/src/lib.rs

@@ -23,11 +23,17 @@ mod error;
 
 pub use error::Error;
 
+/// The type of the current operating system, as returned by [`type_`].
 pub enum OsType {
+    /// Linux and Linux-based systems such as FreeBSD, DragonFly BSD, NetBSD and OpenBSD.
     Linux,
+    /// Windows.
     Windows,
+    /// macOS.
     Macos,
+    /// iOS.
     IOS,
+    /// Android.
     Android,
 }
 
@@ -127,6 +133,7 @@ impl InitJavascript<'_> {
     }
 }
 
+/// Initializes the plugin.
 pub fn init<R: Runtime>() -> TauriPlugin<R> {
     let init_js = InitJavascript::new()
         .render_default(&Default::default())