fix(emoji): index emoji data once for search functions

[Antreesy]

☑️ Resolves

• Index emoji 'database' only when first time calling a function (like emojiSearch())
• Apply method similar to what is used in EmojiPicker

🖼️ Screenshots

Tested with:

	console.time('emoji')
	for (let i = 0; i < N; i ++) {
		const em1 = emojiSearch(text, 10)
	}
	console.timeEnd('emoji')

🏚️ Before (N = 10)	🏚️ Before (N = 1000)	🏡 After (N = 1000)

🏁 Checklist

• ⛑️ Tests are included or are not applicable
• 📘 Component documentation has been extended, updated or is not applicable
• 3️⃣ Backport to next requested with a Vue 3 upgrade

[ShGKme]

💙

[susnux]

/backport to next