Update collect take input with specified format

[davidallendj]

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Description

This PR changes the collect command to take JSON or YAML as input from the scan command. This allows for the entire discovery process to be completed as a single command without hitting the file system.

Examples:

# scan -> collect
magellan scan --subnet 172.18.0.0/24 --port 5000 -l info -i -F json | magellan collect -f json --show-output -i

# scan -> collect -> send
magellan scan --subnet 172.18.0.0/24 --port 5000 -l info -i -F json | magellan collect -f json --show-output -i | magellan send https://smd.example.com

# collect -> send
magellan collect pdu x3000m0 x3000m1 -u admin -p initial0 | magellan send https://smd.example.com

Fixes #128

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

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