The groupsToRows function was not setting the Group field on
groupTableRow, causing JSON output to contain zero-value structs. Table
output was unaffected since it uses separate fields.
BREAKING CHANGE: The JSON output structure changes from `{"Group":
{"id": ...}}` to `{"id": ...}` (flat). This is technically a breaking
change, but JSON output never contained real data (all fields were
zero-valued), so no working consumer could exist. We're taking the
opportunity to flatten the structure to match other list commands like
`coder list -o json`.
Zach
a46336c3ec