feat(manager/config): add RedisConfig with documentation

[yxxhero]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.39%. Comparing base (fb5e1d7) to head (e28328f).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4043      +/-   ##
==========================================
- Coverage   34.40%   34.39%   -0.01%     
==========================================
  Files         343      343              
  Lines       40211    40211              
==========================================
- Hits        13835    13832       -3     
  Misses      25461    25461              
- Partials      915      918       +3     

Flag	Coverage Δ
unittests	34.39% <ø> (-0.01%)	⬇️

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

Files with missing lines	Coverage Δ
manager/config/config.go	96.18% <ø> (ø)

... and 2 files with indirect coverage changes

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[gaius-qi]

LGTM

[Liam-Zhao]

LGTM

[chlins]

lgtm