Code formatter for Common Lisp.

Based on CST (Concrete Syntax Tree), handles indentation, parenthesis placement, and comment preservation according to standard Common Lisp conventions.

Features

1. Parenthesis placement: Does not place closing ) on separate lines, collecting them at line ends.
2. Standard indentation:
   • Body of definition forms like defun, defmacro, defmethod: 2 spaces
   • Binding forms like let, let*, flet, labels: binding part and 2-space body
   • Control structures like if, when, unless, cond, case: appropriate indentation
   • Blocks like with-*, dolist, dotimes, loop, progn: 2 spaces
   • General function calls: aligned with first argument or 2 spaces
3. Preserving comments and blank lines:
   • Preserves positions of ;;;;, ;;;, ;;, ; and inline comments.
   • Preserves intentional blank lines (compresses consecutive blank lines to one).