Add flag in agent to catch all exceptions

## Type of Issue

Select the type of issue:
- [x] Bug report (to report a bug)
- [ ] Feature request (to request an additional feature)
- [ ] Tracker (I am just using this as a tracker)
- [ ] Refactor request
- [ ] Documentation Ask

## Description
Support a mode where the agent fails gracefully.

## Current Behavior

Exceptions are always raised, which is bad UX for non internal users. This is especially problematic when we're running agent in remote containers, where we can't intervene to restart after crashes.

## Expected Behavior

In production settings, let's catch all exceptions instead of raising.

Code pointers:
https://github.com/facebookresearch/droidlet/blob/main/base_agent/core.py#L16
https://github.com/facebookresearch/droidlet/blob/77e9ad05dd68249a7c0fdba13c8b4f853ff5ec5f/base_agent/loco_mc_agent.py#L147
https://github.com/facebookresearch/droidlet/blob/main/base_agent/loco_mc_agent.py#L208