feat: enable TS autocomplete for Svelte HTML element definitions

packages/svelte/elements.d.ts

@@ -2066,7 +2066,7 @@ export interface SvelteHTMLElements {
 		failed?: import('svelte').Snippet<[error: unknown, reset: () => void]>;
 	};
 
-	[name: string]: { [name: string]: any };
+	[name: string & {}]: { [name: string]: any };
 }
 
 export type ClassValue = string | import('clsx').ClassArray | import('clsx').ClassDictionary;

packages/svelte/svelte-html.d.ts

@@ -250,7 +250,7 @@ declare global {
 			};
 			// don't type svelte:options, it would override the types in svelte/elements and it isn't extendable anyway
 
-			[name: string]: { [name: string]: any };
+			[name: string & {}]: { [name: string]: any };
 		}
 	}
 }