Reducing redundant computations and string operations for multi-table formatting

[darkriszty]

There are currently three areas in the prettification pipeline where performance can be improved, especially when handling multiple tables.

• MultiTablePrettyfier initialization: avoid redundant setup for each prettification call to reduce overhead during document formatting.
• Reuse instances where possible: cache and reuse components to avoid repeated instantiation and improve efficiency (eg: PadCalculatorSelector and AlignmentMarkerStrategy).
• Avoid string concatenation in TableStringWriter: use array-based row construction instead of repeated string concatenation to reduce allocations.

These changes should lead to faster formatting of individual tables and multiple tables by reducing allocations and GC.