v0.6.0

• Cleaned up eos/kap documentation and naming conventions for consistency.
• Updated profile examples to pass physical T/Rho directly, or pass logT/logRho with input_mode="log10" without Python-side exponentiation.
• Kept canonical uppercase metadata constants, while adding lowercase aliases for cleaner Python use.
• Removed duplicate capital-T solver aliases; use eos_solve_t / solve_t.
• docs clean up.