Symbolica 2.0.0

Symbolica 2.0 has been released! 🎉

Symbolica 2.0 is a major update with a redesigned evaluator stack, richer
Python and Rust APIs, and broader support for special functions and notebook
display.

• Added many transcendental and special functions, including gamma, zeta,
  polylogarithms, Bessel functions, Euler gamma, two-argument atan, and Laurent
  series support around poles.
• Reworked expression evaluation around a unified evaluator API, with builder
  patterns in Rust, a simpler Python evaluator constructor, improved error
  handling, and direct expression evaluation through a single constants map.
• Added custom symbol evaluation and series hooks, including tagged external
  functions, arbitrary-precision constants, C++ external function export, and
  automatic dualization support.
• Improved optimized numerical evaluation with SymJIT 2.18, JIT compilation
  options, SIMD always enabled in the SymJIT backend, save/load support for JIT
  evaluators, and faster batch JIT matrix evaluation.
• Added rich output for notebooks: HTML, LaTeX, and formatted display for
  expressions, series, polynomials, matrices, and graphs.
• Added symbol import/export, ASCII export names, wrapped exported rationals,
  and better function-map merging for exported or optimized evaluators.
• Improved polynomial and rational-polynomial workflows with simpler
  conversion APIs, coefficient-based collection, faster factoring/conversion,
  and Hu-Monagan polynomial GCD enabled when expected to be faster.
• Added a Rust prelude with common imports, plus method-style transcendental
  functions through the new TranscendentalFunctions trait.

Breaking/API changes:

• Removed deprecated methods and shortened Python custom symbol keywords:
  custom_normalization, custom_print, and custom_derivative are now
  normalization, print, and derivative.
• Python Expression.evaluate(constants, functions) and
  evaluate_complex(...) were folded into Expression.evaluate(constants).
• Python optimized evaluator construction changed from
  expr.evaluator(constants, functions, params, ...) to
  expr.evaluator(params, functions=..., ...).
• Rust evaluator construction now returns an EvaluatorBuilder; JIT compilation
  now takes JITCompilationSettings.
• Print options changed: square_brackets_for_function was removed in favor of
  function_brackets, and custom_print_mode now accepts structured data.
• Graph.generate(...) renamed external_nodes to external_edges.
• Minimum Rust version is now 1.89.

Check the migration guide for more details.