feat(types/try_from_impl): Add a trixy::String from &str impl

This makes it more convenient to use the api.

src/types/traits/try_from_impl.rs

@@ -33,6 +33,12 @@ impl From<std::string::String> for String {
         String(c_char)
     }
 }
+/// Plainly here for convenience
+impl From<&str> for String {
+    fn from(value: &str) -> Self {
+        value.to_owned().into()
+    }
+}
 
 impl TryFrom<String> for std::string::String {
     type Error = crate::types::error::TypeConversionError;