Function synthesize_from_spec 

pub fn synthesize_from_spec(
    spec: &str,
    config: &SynthesisConfig,
) -> SynthesisResult

Synthesize a hardware circuit from an English specification.

This is the top-level entry point that orchestrates the full pipeline:

1. Parse the spec and build a kernel-level specification type
2. Try tactic-based proof search (try_hw_auto)
3. If tactics succeed, extract Verilog from the proof term
4. Return the result with proof term and Verilog