Update deps and helia

[confleux]

• Updated dev deps and others
• Updating express caused issue, which i resolved:

src/api/file.ts:13:54 - error TS2769: No overload matches this call.
  The last overload gave the following error.
    Argument of type '(req: Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>, res: Response<any, Record<string, any>, number>) => Promise<...>' is not assignable to parameter of type 'RequestHandlerParams<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.
      Type '(req: Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>, res: Response<any, Record<string, any>, number>) => Promise<...>' is not assignable to type 'RequestHandler<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.
        Type 'Promise<Response<any, Record<string, any>, number> | undefined>' is not assignable to type 'void | Promise<void>'.
          Type 'Promise<Response<any, Record<string, any>, number> | undefined>' is not assignable to type 'Promise<void>'.
            Type 'Response<any, Record<string, any>, number> | undefined' is not assignable to type 'void'.
              Type 'Response<any, Record<string, any>, number>' is not assignable to type 'void'.

13 router.post('/upload', multerStorage.array('files'), async (req, res) => {

• Updating eslint to v9 forced to use flat config instead of .eslintrc.json. We've used to have gts, but it's not updated to support eslint v9, so I've created new config and removed gts.
• Updating helia caused issue with renaming connectionEncryption to connectionEncrypters, which I've resolved
• Updating unixfs caused issue with method addFile() wrapping a file into a dir and returning dir's cid instead of file's, so I've used method addByteStream()