MkCodeのパースエンジンをShikiに変更 (#12102)

* (swap) prism -> shiki

* fix styles

* (bump) aiscript-vscode to v0.0.5

* refactor

* replace prism-editor (beta)

* Update scratchpad.vue

* (enhance) MkCodeEditor自動インデント改行

* (fix) lint

* (add) scratchpad: MkStickyContainer

* Update CHANGELOG.md

* clean up

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/scripts/code-highlighter.ts

@@ -0,0 +1,31 @@
+import { setWasm, setCDN, Highlighter, getHighlighter as _getHighlighter } from 'shiki';
+
+setWasm('/assets/shiki/dist/onig.wasm');
+setCDN('/assets/shiki/');
+
+let _highlighter: Highlighter | null = null;
+
+export async function getHighlighter(): Promise<Highlighter> {
+	if (!_highlighter) {
+		return await initHighlighter();
+	}
+	return _highlighter;
+}
+
+export async function initHighlighter() {
+	const highlighter = await _getHighlighter({
+		theme: 'dark-plus',
+		langs: ['js'],
+	});
+
+	await highlighter.loadLanguage({
+		path: 'languages/aiscript.tmLanguage.json',
+		id: 'aiscript',
+		scopeName: 'source.aiscript',
+		aliases: ['is', 'ais'],
+	});
+
+	_highlighter = highlighter;
+
+	return highlighter;
+}