[CLI] add --status filter to gitt issues list

[dataCenter430]

Problem

gitt issues list always returns every issue regardless of status. There is no way to quickly see only active, completed, or cancelled issues from the CLI.

Proposed Solution

Add a --status option to gitt issues list:

gitt issues list --status active
gitt issues list --status registered
gitt issues list --status completed
gitt issues list --status cancelled

Omitting --status preserves existing behaviour (all issues returned).
Please feel free to share your thoughts.