This commit involves several updates to improve the handling of indexes and exceptions in database transactions. These updates range from enhancing transaction methods such as SaveIndexFile and PhysicalCreateIndexFinish for better error management, to improving storage efficiency through replacing WriteIndexFile function with WriteIndexToMemory. An enhancement to the transaction module for more accurate and efficient checking for existing keys has been also implemented.

This change refactors `logical_planner.cpp` to instantiate `base_index_ptr` within the loop, thereby improving scope control and possibly reducing memory usage. Moreover, it aligns with the good programming practice of declaring variables in the smallest meaningful scope.

The BooleanT type has been replaced with bool in several places throughout multiple source files. This promotes consistency and improves readability, aligning more closely to standard C++ conventions. Changes have been applied in methods dealing with transactions, index creation, and memory management.