Add FastTanhSinhQuadrature.jl interface

[ChrisRackauckas-Claude]

Summary

• Add support for FastTanhSinhQuadrature.jl as a new integration backend via package extension
• FastTanhSinhQuadrature.jl provides high-performance SIMD-accelerated Tanh-Sinh (double exponential) quadrature
• Supports 1D, 2D, and 3D integration

Related announcement: https://discourse.julialang.org/t/ann-fasttanhsinhquadrature-jl-high-performance-simd-accelerated-numerical-integration/135271

Changes

• Add FastTanhSinhQuadratureJL algorithm struct with tol and max_levels parameters
• Create IntegralsFastTanhSinhQuadratureExt extension module in ext/
• Add to Project.toml: weakdeps, extensions, compat, extras, and test targets
• Add to interface tests with appropriate capability flags (nout=Inf, min_dim=1, max_dim=3, allows_batch=false, allows_iip=false)
• Export FastTanhSinhQuadratureJL from main module

Usage Example

using Integrals, FastTanhSinhQuadrature

# 1D integration
f(x, p) = cos(x)
prob = IntegralProblem(f, (0.0, 1.0))
sol = solve(prob, FastTanhSinhQuadratureJL())

# 2D integration
f2d(x, p) = x[1] * x[2]
prob2d = IntegralProblem(f2d, ([0.0, 0.0], [1.0, 1.0]))
sol2d = solve(prob2d, FastTanhSinhQuadratureJL(tol=1e-10))

Note

FastTanhSinhQuadrature.jl is not yet registered in the General registry. Users will need to add it from GitHub:

Pkg.add(url="https://github.com/svretina/FastTanhSinhQuadrature.jl")

Test plan

• Verified 1D integration works correctly
• Verified 2D integration works correctly
• Verified 3D integration works correctly
• Verified reltol parameter is passed through correctly
• Interface tests pass (requires FastTanhSinhQuadrature.jl to be registered or manually added to CI)

🤖 Generated with Claude Code

[svretina]

the package has been merged to JuliaRegistries. Checks should now pass

[svretina]

Hi @ChrisRackauckas ,

would it be possible to try again the checks ?