feat(cli): increase fish pipe length and add demo video

[joshuali925]

Description

fish pipe is too short, some status text from OSI pipeline might get truncated

complete demo (some loading time is cut off)

This demo will be added to docs, can maintainers add mp4 to the release artifact?
https://github.com/opensearch-project/observability-stack/releases/tag/v3.6.0-alpha.1

https://github.com/opensearch-project/observability-stack/releases/download/v3.6.0-alpha.1/observability-stack-aws-cli.mp4

cloud-cli-demo.mp4

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.62%. Comparing base (71fe630) to head (4ea778f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #170   +/-   ##
=======================================
  Coverage   55.62%   55.62%           
=======================================
  Files           4        4           
  Lines         169      169           
  Branches       47       48    +1     
=======================================
  Hits           94       94           
  Misses         74       74           
  Partials        1        1           

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