chore: bump eslint-plugin-svelte version to fix linting bug

In version 2.46.1, which we previously used, eslint couldn't handle svelte each blocks without 'as'.
We use on of these blocks on the project members settings page (src/routes/project/[projectId]/settings/members/+page.svelte):
```svelte
{#each { length: numberOfSkeletons }, i}
    <ProjectMemberListEntrySkeleton />
    {#if i < numberOfSkeletons - 1}
        <Separator />
    {/if}
{/each}
```
This was reported in sveltejs/eslint-plugin-svelte#953 and fixed in version 3.0.0-next.5.
Now eslint works again with our codebase.

eslint.config.js

@@ -1,6 +1,7 @@
 import prettier from "eslint-config-prettier";
 import js from "@eslint/js";
 import svelte from "eslint-plugin-svelte";
+import svelteParser from "svelte-eslint-parser";
 import globals from "globals";
 import ts from "typescript-eslint";
 
@@ -19,9 +20,18 @@ export default ts.config(
         },
     },
     {
-        files: ["**/*.svelte"],
-
+        files: ["**/*.svelte", "*.svelte"],
+        languageOptions: {
+            parser: svelteParser,
+            parserOptions: {
+                parser: ts.parser,
+            },
+        },
+    },
+    {
+        files: ["**/*.svelte.ts", "*.svelte.ts"],
         languageOptions: {
+            parser: svelteParser,
             parserOptions: {
                 parser: ts.parser,
             },

package.json

@@ -43,7 +43,7 @@
         "clsx": "^2.1.1",
         "eslint": "^9.20.1",
         "eslint-config-prettier": "^10.0.1",
-        "eslint-plugin-svelte": "^2.46.1",
+        "eslint-plugin-svelte": "^3.0.0-next.18",
         "fzf": "^0.5.2",
         "globals": "^15.13.0",
         "jsdom": "^26.0.0",