Sticky sidebar fix (#12)

* Remove svelte-spotlight package

* Copy spotlight component from svelte-spotlight and fix

* Fix exception-handler text typo

* Remove old exception handler file

I've renamed this file to correct filename exception-handler.md in my branch, i.e. removed the double dot.
This was probably brought back through merging the PR, so removing it again since it causes a double Exception Handler entry in the sidebar

Author: vzakanj

package-lock.json

@@ -55,7 +55,6 @@
 	"type": "module",
 	"dependencies": {
 		"flexsearch": "^0.7.31",
-		"marked": "^4.2.2",
-		"svelte-spotlight": "^1.0.4"
+		"marked": "^4.2.2"
 	}
 }

package.json

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import SvelteSpotlight from 'svelte-spotlight/SvelteSpotlight.svelte';
+	import SvelteSpotlight from './spotlight/SvelteSpotlight.svelte';
 	import { createEventDispatcher } from 'svelte';
 	import type { SearchResult } from '../../types';