Add fault tolerant logical state preparation circuits

[perlinm]

It would be very useful to have circuits that fault tolerantly prepare, say, a logical all-|0> or all-|+> state.

In addition to being practically useful for simulations and experiments, this would enable Steane and Knill QEC (#304)

Related work:

• https://arxiv.org/abs/2402.17761
• https://arxiv.org/abs/2411.04405
• https://arxiv.org/abs/2408.11894
• https://quantum-journal.org/papers/q-2019-05-20-143 (magic states)

[perlinm]

For HGPCodes: https://arxiv.org/abs/2410.05171

[perlinm]

mqt-qecc should have tools for this

[perlinm]

This looks very promising: https://arxiv.org/abs/2508.14200