Typecast refactoring

[Tigrov]

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

[what-the-diff]

PR Summary

• Updated the .gitignore file
  The .gitignore file was revised. Specifically, we made sure it includes the /phpunit.xml file and does not include /phpunit.result.cache. This helps keep our repository clean and makes sure that only essential files are tracked for changes.

• Refactored the dbTypecast and phpTypecastValue methods in the ColumnSchema.php file
  The coding techniques used within these two methods have been enhanced, utilizing the modern match expression in contrast with previous if-else and switch statements. This makes our code more readable, concise, and it can improve performance.

• Updated the $typeMap array in the Schema.php file
  The mapping system to register our data types has been expanded by including key-value pairs for 'bit', 'bit varying', and 'varbit' types. This allows us to support more types of data in our application, thus enhancing versatility and compatibility.

• Refactored the findColumns and loadColumnSchema methods in the Schema.php file
  These methods, crucial for interacting with database columns, are now utilizing the more efficient match expression as opposed to previous if-else statements. Similar to the ColumnSchema refactoring, this step improves our code's readability and efficiency.

• Added the normalizeDefaultValue method in the Schema.php file
  A new function was implemented that adjusts the default value of a column based on the set PHP type. This addition assures consistency and better reliability when working with default values in our database columns.

[Tigrov]

Waiting for review of #287 to avoid conflicts

[codecov]

Codecov Report

Patch coverage: 98.27% and project coverage change: -0.01 ⚠️

Comparison is base (e961047) 99.67% compared to head (add4688) 99.67%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #288      +/-   ##
============================================
- Coverage     99.67%   99.67%   -0.01%     
+ Complexity      212      203       -9     
============================================
  Files            13       13              
  Lines           619      609      -10     
============================================
- Hits            617      607      -10     
  Misses            2        2              

Impacted Files	Coverage Δ
src/Schema.php	99.61% <97.14%> (-0.02%)	⬇️
src/ColumnSchema.php	100.00% <100.00%> (ø)

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[darkdef]

Great work. Thanks