10 times faster compiling speed

[shinokada]

This update allows users who use a small number of components to shorten the compiling time:

import Alert from 'flowbite-svelte/Alert.svelte'

package	files	time	avg
flowbite-svelte	4	23.8ms	6.0ms

If you use a normal import:

import { Alert } from 'flowbite-svelte';

package	files	time	avg
flowbite-svelte	145	0.23s	1.6ms

Ten times faster.

The main change is to add individual exports to package.json.

 "exports": {
    "./Accordion.svelte": {
      "types": "./dist/accordions/Accordion.svelte.d.ts",
      "svelte": "./dist/accordions/Accordion.svelte"
    },
    "./AccordionItem.svelte": {
      "types": "./dist/accordions/AccordionItem.svelte.d.ts",
      "svelte": "./dist/accordions/AccordionItem.svelte"
    },
...

A new script, add-exports-to-package-json.js, is added to the scripts dir.

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Name	Status	Preview	Comments	Updated
flowbite-svelte	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 18, 2023 at 0:35AM (UTC)
flowbite-svelte-update	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 18, 2023 at 0:35AM (UTC)

[shinokada]

@jjagielka I need your input for this PR.

[jjagielka]

It makes complete sense. The package has grew really big and this PR would allow build in parts.
I've played with it a bit, and seems like a really good move.

I think we can proceed with it to be official.