Update eslint to v9 (#35485)

Update eslint and all plugins. Many plugins still do not ship type
definitions so I had to add stubs. Also, I had to put a few typescript
error expectations because if some unknown error in the types.

`eslint-plugin-no-jquery` is disabled because it's not compatible with
eslint 9 flat config
(https://github.com/wikimedia/eslint-plugin-no-jquery/issues/311).

web_src/js/features/comp/EditorMarkdown.ts

@@ -18,7 +18,7 @@ type TextareaValueSelection = {
   value: string;
   selStart: number;
   selEnd: number;
-}
+};
 
 function handleIndentSelection(textarea: HTMLTextAreaElement, e: KeyboardEvent) {
   const selStart = textarea.selectionStart;
@@ -65,14 +65,14 @@ function handleIndentSelection(textarea: HTMLTextAreaElement, e: KeyboardEvent)
 type MarkdownHandleIndentionResult = {
   handled: boolean;
   valueSelection?: TextareaValueSelection;
-}
+};
 
 type TextLinesBuffer = {
   lines: string[];
   lengthBeforePosLine: number;
   posLineIndex: number;
   inlinePos: number
-}
+};
 
 export function textareaSplitLines(value: string, pos: number): TextLinesBuffer {
   const lines = value.split('\n');