[Docs] add streaming support example for file and directory

[DenChenn]

Tracking issue

Related to #4460
Example PR: flyteorg/flytesnacks#1759

Why are the changes needed?

This PR introduces file streaming support for both FlyteFile and FlyteDirectory in our document.

Related PRs

flyteorg/flytekit#1512

Docs link

https://flyte--5879.org.readthedocs.build/en/5879/user_guide/data_types_and_io/flytefile.html
https://flyte--5879.org.readthedocs.build/en/5879/user_guide/data_types_and_io/flytedirectory.html

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.71%. Comparing base (38af4ec) to head (e35f695).
Report is 14 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5879      +/-   ##
==========================================
- Coverage   36.72%   36.71%   -0.01%     
==========================================
  Files        1304     1304              
  Lines      130072   130081       +9     
==========================================
- Hits        47764    47757       -7     
- Misses      78138    78154      +16     
  Partials     4170     4170              

Flag	Coverage Δ
unittests-datacatalog	51.58% <ø> (ø)
unittests-flyteadmin	54.39% <ø> (-0.05%)	⬇️
unittests-flytecopilot	11.73% <ø> (ø)
unittests-flytectl	62.40% <ø> (ø)
unittests-flyteidl	6.89% <ø> (ø)
unittests-flyteplugins	53.62% <ø> (ø)
unittests-flytepropeller	42.84% <ø> (ø)
unittests-flytestdlib	54.76% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.