feat(index): add RangeReader trait

[zhongzc]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

#4717

What's changed and what's your intention?

Introduce RangeReader and apply for InvertedIndeFooterReader and InvertedIndexBlobReader.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

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[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 10 lines in your changes missing coverage. Please review.

Project coverage is 84.53%. Comparing base (dcae212) to head (4b6b26a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4718      +/-   ##
==========================================
- Coverage   84.81%   84.53%   -0.28%     
==========================================
  Files        1114     1114              
  Lines      200738   200672      -66     
==========================================
- Hits       170247   169642     -605     
- Misses      30491    31030     +539