FEAT: Python/Sollya driver that used for generates LUT/Constants

[seiko2plus]

Argument reduction & tables:

• Payne–Hanek tables via chunked 4/π per exponent range (reduction.h.sol)
• π splits for FMA/non-FMA and float/double (constants.h.sol)
• Compact 4-term (value + derivatives) LUTs (approx.h.sol)
• Precomputed sin/cos(k·π/16) for quadrant handling (kpi16-inl.h.sol)

Sollya-driven codegen pipeline:

• Tooling lives in tools/sollya with shared helpers
• CLI: spin sollya [-f] (via .spin/cmds.py) to (re)generate headers
• Project wiring: pyproject.toml matters for spin

[Copilot]

Pull Request Overview

This PR introduces a Python/Sollya driver system for automatically generating lookup tables and mathematical constants used in trigonometric computations. The system enables precise generation of argument reduction tables, π splits for different architectures, compact lookup tables for trigonometric approximations, and precomputed sin/cos values.

Key changes include:

• Implementation of a comprehensive Sollya utility library with floating-point type descriptors and code generation helpers
• Python-based CLI tool for processing Sollya scripts with parallel execution and colored output
• Integration with the project's build system through pyproject.toml and spin commands

Reviewed Changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tools/sollya/core.sol	Core Sollya utility library with type descriptors, bit manipulation, and code generation procedures
tools/sollya/main.py	Python CLI driver for processing Sollya scripts with parallel execution and error handling
tools/sollya/init.py	Package initialization exposing the main function
pyproject.toml	Project configuration with spin command integration
npsr/trig/data/reduction.h.sol	Sollya script generating Payne-Hanek reduction tables for trigonometric functions
npsr/trig/data/kpi16-inl.h.sol	Script generating sin/cos lookup tables for k·π/16 values with packed low-precision parts
npsr/trig/data/data.h.sol	Master header inclusion script for trigonometric data tables
npsr/trig/data/constants.h.sol	Script generating π-related constants for Cody-Waite reduction in various precisions
npsr/trig/data/approx.h.sol	Script generating 4-element lookup tables for fast trigonometric approximation
.spin/cmds.py	Spin command integration for the sollya code generation tool

Comments suppressed due to low confidence (1)

tools/sollya/core.sol:1

• Corrected spelling of 'Tuble' to 'Table'.

// Sollya utility functions for generating C++ header files with mathematical constants and lookup tables

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[seiko2plus]

The approx LUTs of large arguments weren't accurate. They have been fixed, and locally bit-exact tested against Intel SVML. The newly generated header is part of PR #10.