Update JS dependencies and misc tweaks (#21583)

- Update all JS dependencies to latest version
- Disable two redundant eslint rules
- Adapt stylelint config to codebase
- Regenerate SVGs
- Make file editor spinner "reserve" height so page does not shift
- Tested katex, swagger, monaco

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>

web_src/less/features/codeeditor.less

@@ -1,4 +1,5 @@
-.monaco-editor-container {
+.monaco-editor-container,
+.editor-loading.is-loading {
   width: 100%;
   min-height: 200px;
   height: 90vh;