fix: Fix the schema part in the INDEX DDL for postgres and cockroachdb as it was incorrect AND Support CockroachDB FLOAT4 FLOAT8

[ginokent]

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#3

What's changed

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• Added functionality to perform 'bar' on 'foo'.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.74%. Comparing base (be78ae9) to head (96aafd1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #85      +/-   ##
==========================================
+ Coverage   92.69%   92.74%   +0.04%     
==========================================
  Files          84       84              
  Lines        7130     7122       -8     
==========================================
- Hits         6609     6605       -4     
+ Misses        501      499       -2     
+ Partials       20       18       -2     

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