Ecs local add filter v1

[iamhopaul123]

Issue #, if available:

Description of changes:
Added the "--task-def" and "--file" flags to "local ps/down", so that users can filter to show the running containers or to down them.

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Testing

• Unit tests passed
• Integration tests passed
• Unit tests added for new functionality
• Listed manual checks and their outputs in the comments (example)
• Link to issue or PR for the integration tests:

Documentation

• Contacted our doc writer
• Updated our README

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