Feature idea: periodic forge scripts

[naps62]

Why

this gives us a powerful ability of simulating outside events on a private testnet (e.g.: simulating yield being generated over time)

How

Additional ops for a stack:

{
  "forge_script": {
    "script: "<code>",
    "cron": "0/1 0 0 0 0" # cron-style info of when to run it 
  }
}

if a script exists, a new task is spawned for this stack that compiles & runs the script with the given cron schedule (must be compiled everytime since it may change over time)