[docs] Add implication of not having simulating simulations

[critesjosh]

Let's do a doc on how this may break some contracts (especially with no authwits) and its other poor uX/Devex repercussions. e.g. reading functions that change state can cause state changes in the simulator, like in this example contract, where reading teh hotp code causes it to increment

AztecProtocol/aztec-packages#9133