Update JS deps, misc tweaks (#35643)

- Update all JS dependencies
- Enable eslint `no-useless-assignment` and fix 2 discovered issues
- Replace `gitea-vscode` svg with new `octicon-vscode`
- Remove now-unused `@ts-expect-error` comments
- Change Monaco wrapping behaviour to match the wrapping in code view:
no wrapping indent and break on any character.

web_src/js/features/dropzone.ts

@@ -28,7 +28,6 @@ async function createDropzone(el: HTMLElement, opts: DropzoneOptions) {
 export function generateMarkdownLinkForAttachment(file: Partial<CustomDropzoneFile>, {width, dppx}: {width?: number, dppx?: number} = {}) {
   let fileMarkdown = `[${file.name}](/attachments/${file.uuid})`;
   if (isImageFile(file)) {
-    fileMarkdown = `!${fileMarkdown}`;
     if (width > 0 && dppx > 1) {
       // Scale down images from HiDPI monitors. This uses the <img> tag because it's the only
       // method to change image size in Markdown that is supported by all implementations.