Support brackets in real type

[CGNonofr]

Currently, using realType('A {random string}') throw an error, instead of just inserting the string as is

[what-the-diff]

PR Summary

• Improved String Validation in 'realType' Function
  This update enhances the 'realType' function's verification mechanism to include an additional check for characters (termed 'availableChars'). The purpose is to ensure that only the characters which are both available and meet our pre-set conditions (against a pattern defined using regular expressions or 'regex') are processed further. This approach boosts the precision of our data handling operations.