astro 5.12.2

#14071 d2cb35d Thanks @Grisoly! - Exposes the Code component lang prop type:
```
import type { CodeLanguage } from 'astro';
```
#14111 5452ee6 Thanks @ascorbic! - Fixes a bug that prevented "key" from being used as a prop for Astro components in MDX
#14106 b5b39e4 Thanks @ascorbic! - Exits with non-zero exit code when config has an error
#14112 37458b3 Thanks @ascorbic! - Fixes a bug that meant that SVG components could no longer be serialized with JSON.stringify
#14061 c7a7dd5 Thanks @jonasgeiler! - Add module declaration for ?no-inline asset imports
#14109 5a08fa2 Thanks @ascorbic! - Throw a more helpful error if defineLiveCollection is used outside of a live.config file
#14110 e7dd4e1 Thanks @ascorbic! - Warn if duplicate IDs are found by file loader