Add more decorators

[kmolan]

1. Force Result (ForceSuccess / ForceFailure): Overrides a child's outcome (e.g., converts Failure to Success so optional tasks don't stop the tree).
2. Timeout: Halts a child node and returns Failure if it stays in the Running state longer than a set time limit.
3. Retry / Repeat: Loops execution. Retry(N) re-runs a node up to N times if it fails; Repeat(N) re-runs it N times if it succeeds.
4. KeepRunningUntilFailure: Keeps returning Running while the child succeeds, stopping only on Failure.