Added a RessourceManager for uploading files

src/lib/RessourceManager.svelte

@@ -0,0 +1,68 @@
+<script lang="ts">
+    import { env } from "$env/dynamic/public";
+    import axios from "axios";
+    import Modal from "./Modal.svelte";
+
+    interface Props {
+        show: boolean;
+    }
+
+    let { show = $bindable(false) }: Props = $props();
+
+    let file: File | null = null;
+    let path: string = "/";
+
+    function handleFileChange(event: Event) {
+        const target = event.target as HTMLInputElement | null;
+        if (target?.files?.[0]) {
+            file = target.files[0];
+        }
+    }
+
+    function uploadData(event: SubmitEvent) {
+        event.preventDefault();
+        if (file === null) return;
+
+        const formData = new FormData();
+        formData.append("path", path);
+        formData.append("file", file);
+
+        axios.post(
+            `${env.PUBLIC_JEOPARDY_SERVER_PROTOCOL}://${env.PUBLIC_JEOPARDY_SERVER}/upload`,
+            formData,
+            {
+                withCredentials: true,
+                headers: {
+                    "Content-Type": "multipart/form-data"
+                },
+                onUploadProgress: (event) => {
+                    console.log(event);
+                }
+            }
+        );
+    }
+</script>
+
+<Modal
+    bind:showModal={show}
+    okFn={async () => {
+        console.log("ok");
+        return true;
+    }}
+>
+    {#snippet header()}
+        <h2 class="text-3xl">Ressourcenmanager</h2>
+    {/snippet}
+    <div>Ressourcenmanager</div>
+    {#snippet actionButtons()}
+        <form
+            action={`${env.PUBLIC_JEOPARDY_SERVER_PROTOCOL}://${env.PUBLIC_JEOPARDY_SERVER}/upload`}
+            enctype="multipart/form-data"
+            method="post"
+            onsubmit={uploadData}
+        >
+            <input class="btn" type="file" name="file" onchange={handleFileChange} />
+            <input type="submit" value="Hochladen" class="btn" />
+        </form>
+    {/snippet}
+</Modal>