feat: ledger checkpoint, rewinding, and height action

[Meshiest]

automatically create checkpoints given retention policies in a format similar to duplicati's

this mechanism works by providing Rules formatted like 1W:1D, aka for a 1 week time period, keep backups 1 day apart.

The following is the default policy

"4h:1h", // for 4 hours, keep a checkpoint every hour
"1D:8h", // for 1 day, keep a checkpoint every 8 hours
"1W:1D", // for 1 week, keep a checkpoint every day
"4W:1W", // for 4 weeks, keep a checkpoint every week
"4M:1M", // for 4 months, keep a checkpoint every month
"U:1Y",  // for all time, keep a checkpoint every year

This policy will be applied to the replay command when enabled, and the running node.

Adds aot ledger checkpoint commands:

Usage: snarkos-aot ledger --genesis <GENESIS> --ledger <LEDGER> checkpoint <COMMAND>

Commands:
  create  Create a checkpoint for the given ledger
  apply   Apply a checkpoint to the given ledger
  view    View the available checkpoints
  clean   Cleanup old checkpoints

Changes truncate --replay into aot ledger replay with an optional --checkpoint flag to generate checkpoints, and aot ledger rewind <checkpoint> to rewind a ledger given a checkpoint file

[gluax]

💀

[Meshiest]

😔

[Meshiest]

to be fair the write feature is only available when running snarkos nodes which uses anyhow anyway

[voximity]

Do we still need these printlns?

[Meshiest]

they'll probably be useful for debugging in a few days