Support table view constraints

[Tigrov]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌
Fixed issues	#6

[what-the-diff]

PR Summary

• Improved Data Loading Methods in Schema
  Modifications have been made to loadTableIndexes, findColumns and loadTableConstraints methods in the Schema.php file to enhance how data is loaded. This was achieved by adding dimensions (left joins) and conditions, enabling much more precise and efficient data retrieving.

• Enhanced Testing Provisions
  Added test cases in ColumnSchemaTest.php, QueryBuilderProvider.php and SchemaTest.php files. These tests will ensure data integrity by checking things like the primary key of a view, the ability to upsert data into a table view, and the correctness of view names.

• Added 'constraintsOfView' Method
  The SchemaProvider.php file now has a new method called constraintsOfView which helps identify constraints in a given view. This serves to tighten data security and integrity by understanding the restrictions in place at the view level.

• SQL file Update
  The pgsql.sql file was updated with new view statements and several view removal statements. This means our database is tweaked, it's more streamlined now with unnecessary views removed and new ones added.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c003f9c) 100.00% compared to head (0f8275f) 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #316   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       187       187           
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  Files             13        13           
  Lines            566       566           
===========================================
  Hits             566       566           

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[vjik]

Looks good, but need add line to changelog