Fix podman stats based on QE feedback

QE found issues with formatting the go template and
the man page was lacking information.
Changed the format of the output to match latest docker.
Add shortID function that returns the truncated ID

Signed-off-by: umohnani8 <umohnani@redhat.com>

Closes: #258
Approved by: rhatdan
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f