Svelte 5 support

[chillenious]

I'm working on a project that uses svelte-jsoneditor. All is well when using the 4.x version of Svelte, but I tried using Svelte 5 today and there seems to be a problem with the svelte preprocessor:

✘ [ERROR] node_modules/svelte-jsoneditor/components/modals/TransformWizard.svelte:94:2 <tr> is invalid inside <table> [plugin vite-plugin-svelte:optimize-svelte]

    node_modules/svelte-jsoneditor/components/modals/TransformWizard.svelte:94:0:
      94 │
         ╵ ^

  The plugin "vite-plugin-svelte:optimize-svelte" was triggered by this import

    node_modules/svelte-jsoneditor/components/modals/TransformModal.svelte:21:28:
      21 │ import TransformWizard from './TransformWizard.svelte';
         ╵                             ~~~~~~~~~~~~~~~~~~~~~~~~~~

I'm not sure why the problem which seems to be triggered by the pre-processor only shows up with 5.

I created a simple project that shows the issue here: https://github.com/chillenious/svelte-jsoneditor-issue. Note that simply by changing the svelte to a 4.x dependency, the project will work again.