René Kijewski f25dac9409 derive: allow split up template attributes
In generated code or macros, it might be useful to emit multiple
`#[template]` attributes. E.g.

```rust
 #[template(source = "Hello!")]
 #[template(ext = "txt")]
 struct Hello;
```
2024-08-07 07:09:19 +02:00
..
2024-06-17 17:25:11 +02:00
2024-08-01 15:41:37 +02:00