feat: SvelteKit update (#1082)

SvelteKit made some routing changes. This PR makes the neccisary
updates:

- `post` in a server endpoint is now called `POST`
- endpoint handlers take an object, and the `request` should be
destructured, ie `handler({request})`
- endpoint handlers now return a `Response()` object (from
[`undici`](https://undici.nodejs.org/))
- to get text of request, call `await request.text()`
- default url for vite in development mode is `localhost:5173`
- updated link to docs (it changed in latest docs)

## TODO
- [x] Update svelte-kit project in examples folder

Co-authored-by: Simon Knott <[email protected]>

Author: joshnuss

docs/docs/api/sveltekit.md

@@ -2,7 +2,7 @@
 title: SvelteKit
 ---
 
-```ts title="src/routes/greetingsQueue.ts"
+```ts title="src/routes/greetingsQueue/+server.ts"
 import { Queue } from "quirrel/sveltekit";
 
 const queue = Queue(
@@ -12,13 +12,13 @@ const queue = Queue(
   }
 );
 
-export const post = queue
+export const POST = queue
 
 export default queue
 ```
 
 Creates a new Queue.
-Make sure to export it from an [endpoint](https://kit.svelte.dev/docs#routing-endpoints), otherwise it won't work.
+Make sure to export it as a [server route](https://kit.svelte.dev/docs/routing#server), otherwise it won't work.
 
 #### Parameters
 

examples/sveltekit/.gitignore

@@ -1,5 +1,5 @@
 .DS_Store
 node_modules
-/.svelte
+/.svelte-kit
 /build
-/functions
+/functions