🐛 Classical bits are not cleared by the CLI's `reset` command

[rturrado]

🤖 AI text below 🤖

Problem statement

resetSimulationState in src/backend/dd/DDSimDebug.cpp rebuilds the quantum state on reset but leaves ddsim->variables (the map of classical bit values) untouched. After a first run followed by reset, reading c[k] returns the value from the previous run rather than the initial false, and the next measure on the same bit looks like a no-op because the bit already holds the value it would receive.

Surfaced during the follow-up work on issue #168 (PR #456) and again during the review of PR #463.

Proposed solution

resetSimulationState should return the classical side to its initial state (all bits to false), the same way the quantum side is rebuilt to zero.

Out of scope

• Persisting classical bit values across code reloads.
• Restoring classical bits when stepping backward past a measurement (tracked in a separate issue).