Add RuntimeException, if table exists.

[terabytesoftw]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

[what-the-diff]

PR Summary

• Added RuntimeException to DbHelper.php
  Enhanced error handling with the addition of a new exception type
• Modified ensureTables() and dropTables() methods in DbHelper.php
  Improved the functionality of database table management methods
• Implemented hasTable() function in DbHelper class
  Added a new private function to check for the existence of a database table
• Added tests for ensureTables and dropTables methods (AbstractDbhelperTest)
  Introduced tests for the updated functionality of database table management methods

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (d5f3e87) 99.18% compared to head (143ad05) 99.19%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #58   +/-   ##
=========================================
  Coverage     99.18%   99.19%           
- Complexity       44       45    +1     
=========================================
  Files             2        2           
  Lines           244      247    +3     
=========================================
+ Hits            242      245    +3     
  Misses            2        2           

Impacted Files	Coverage Δ
src/DbHelper.php	100.00% <100.00%> (ø)

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