Expose CallTrace from snapshots

Add a CallTrace structure that stores information about each frame (arguments, result, child frames), and expose a function we’ll call from the Miden CLI call with the `--trace` option to build the trace from the recorded snapshot. The client is then only responsible for rendering the call tree and controlling how much of the call tree is shown via the --verbose option.

cc @djolertrk @bitwalker

Look for the snapshot recording logic and the Miden CLI's call command. Define a CallTrace struct to capture frame data (arguments, result, children). Add a function to build the trace from snapshots, invoked when the `--trace` flag is used. The CLI will then pass this trace for rendering based on `--verbose`.

Scritto dal modello di indicizzazione a partire dal testo della issue.