chore(search): Update README

[dragonfly1033]

Adds a description of the search crate along with code examples and tips.

• Public API changes documented in changelogs (optional)

Signed-off-by: Shrey Patel [email protected]

[poljar]

Some minor nits and rewordings that make the sentences flow a bit nicer.

[codspeed-hq]

CodSpeed Performance Report

Merging #5694 will not alter performance

_{Comparing dragonfly1033/update_search_readme (f51965a) with main (659ae57)}

Summary

✅ 50 untouched

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.30%. Comparing base (dff6cb4) to head (f51965a).
⚠️ Report is 5 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5694      +/-   ##
==========================================
- Coverage   88.31%   88.30%   -0.01%     
==========================================
  Files         357      357              
  Lines       98567    98567              
  Branches    98567    98567              
==========================================
- Hits        87045    87041       -4     
- Misses       7388     7393       +5     
+ Partials     4134     4133       -1     

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