Add Il2CppString::contains

Author: Raytwo

src/system/string.rs

@@ -42,6 +42,9 @@ fn system_string_copy(string: &Il2CppString, method_info: OptionalMethod) -> &'_
 #[crate::from_offset("System", "String", "Clone")]
 fn system_string_clone(this: &Il2CppString, method_info: OptionalMethod) -> &'_ mut Il2CppString;
 
+#[crate::from_offset("System", "String", "Contains")]
+fn system_string_contains(this: &Il2CppString, value: &Il2CppString, method_info: OptionalMethod) -> bool;
+
 #[crate::from_offset("System", "String", "Equals")]
 fn system_string_equals(a: &Il2CppString, b: &Il2CppString, method_info: OptionalMethod) -> bool;
 
@@ -86,6 +89,10 @@ impl Il2CppString {
         }
     }
 
+    pub fn contains(&self, value: impl AsRef<str>) -> bool {
+        unsafe { system_string_contains(self, value.as_ref().into(), None) }
+    }
+
     /// Provides a new instance of the Il2CppString, separate from the original.
     pub fn clone(&self) -> &'_ Il2CppString {
         // Yes.