Defining `timeout` as a YAML serializable object as part of fsspec storage_options instead of an `aiohttp.ClientTimeout` object

Currently, the only way (as far as I know) to specify timeout as part of storage_options requires instantiating an aiohttp.ClientTimeout object

In [46]: import aiohttp, fsspec
In [49]: timeout = aiohttp.ClientTimeout(total=1000) # The maximal number of seconds
In [57]: storage_options={'http': {'client_kwargs': {'timeout': timeout}}, 'simplecache': {'same_names': True, 'cache_storage':  "{{ env(INTAKE_LOCAL_CACHE_DIR) }}"}}

I would like to be able to specify the timeout in storage_options as a YAML serializable object and have fsspec instantiate the timeout object properly. I was wondering if this is something fsspec allows already and/or whether I am missing something?

Context

I would like to be able to specify the timeout as part of storage_options in an intake-catalog

sources:
  fgapo_CarbonScope_apo99X_v2021:
    driver: netcdf
    description: "Using an atmospheric inversion technique similar to the Jena CO2 inversion, sea-air oxygen exchanges have been estimated from atmospheric O2/N2 measurements (Rödenbeck et al., 2008). In order to eliminate the influence of land processes on atmospheric oxygen abundance, the tracer Atmospheric Potential Oxygen (APO) has been used (Stephens et al., 1998). DOI: 10.17871/CarboScope-apo99X_v2021"
    args:
      urlpath: simplecache::https://www.bgc-jena.mpg.de/CarboScope/apo/INVERSION/OUTPUT/apo99X_v2021_daily.nc
      xarray_kwargs:
        decode_times: false
      chunks: {}
      storage_options:
        client_kwargs:
           timeout: 
             total: 3600
        simplecache:
          same_names: true
          cache_storage: "{{ env(INTAKE_LOCAL_CACHE_DIR) }}"

Start by tracing how storage_options and client_kwargs reach the HTTP filesystem, with the YAML example and aiohttp.ClientTimeout behavior as the reference. Done means a YAML-serializable timeout mapping can be supplied through storage_options and produces the intended timeout without requiring callers to instantiate aiohttp.ClientTimeout.