Update JS dependencies, remove space after emoji completion (#25266)

- Update all JS dependencies
- Enable stylint
[`media-feature-name-value-no-unknown`](https://stylelint.io/user-guide/rules/media-feature-name-value-no-unknown)
- Make use of new features in webpack and text-expander-element
- Tested Swagger and Mermaid

To explain the `text-expander-element` change: Before this version, the
element added a unavoidable space after emoji completion. Now that
https://github.com/github/text-expander-element/pull/36 is in, we gain
control over this space and I opted to remove it for emoji completion
and retain it for `@` mentions.

---------

Co-authored-by: Giteabot <teabot@gitea.io>

templates/shared/combomarkdowneditor.tmpl

@@ -44,7 +44,7 @@ Template Attributes:
 				<button class="markdown-toolbar-button markdown-switch-easymde" data-tooltip-content="{{.locale.Tr "editor.buttons.switch_to_legacy.tooltip"}}">{{svg "octicon-arrow-switch"}}</button>
 			</div>
 		</markdown-toolbar>
-		<text-expander keys=": @">
+		<text-expander keys=": @" suffix="">
 			<textarea class="markdown-text-editor js-quick-submit"{{if .TextareaName}} name="{{.TextareaName}}"{{end}}{{if .TextareaPlaceholder}} placeholder="{{.TextareaPlaceholder}}"{{end}}{{if .TextareaAriaLabel}} aria-label="{{.TextareaAriaLabel}}"{{end}}>{{.TextareaContent}}</textarea>
 		</text-expander>
 		<script>