Support Float32 simulation paths

[AhmedSalih3d]

Motivation

• Enable the library to run simulations and helper functions with Float32 without accidental promotion to Float64 or reinterpret casts that fail for smaller floats.
• Preserve element types when converting 2D SVectors to 3D so generated vectors keep the same float precision.
• Make kernel/tensile helper and timestep utilities accept particle-array inputs and return type-consistent scalar results for Float32.

Description

• Replace the Float64-only reinterpret trick in Estimate7thRoot with a type-generic implementation and add an overload for Real, and update InverseHydrostaticEquationOfState to be type-preserving. (src/SimulationEquations.jl)
• Preserve element types in to_3d by constructing SVector{3,eltype(v)} and using zero(eltype(v)) for the z-component. (src/AuxiliaryFunctions.jl)
• Make the Wendland tensile correction return zero(q) so scalar q inputs (including Float32) produce a zero of the correct type. (src/SPHKernels.jl)
• Add a convenience Δt overload that accepts particle Position, Velocity, and Acceleration vectors and computes the maximum acceleration before delegating to the scalar Δt path. (src/TimeStepping.jl)
• Add a Float32 coverage testset exercising constants, kernel instance creation, Estimate7thRoot, InverseHydrostaticEquationOfState, tensile_correction, to_3d, and the particle-vector Δt. (test/runtests.jl)

Testing

• Ran the package test file with julia --project=. test/runtests.jl and observed the full test suite (including the new Float32 support tests) pass. (success)
• Executed a direct runtime smoke check with julia --project=. -e 'using SPHExample, StaticArrays; T=Float32; ...' that asserts key functions and types return Float32 values and that Δt returns a Float32 timestep. (success)
• Attempted julia --project=. -e 'using Pkg; Pkg.test()' but the invocation stalled during temporary test-environment precompilation; the direct test file execution was used to validate changes instead. (precompilation stalled)

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Codex Task