Add option to list issues in raw JSON

[evg656e]

Add an option to list issues in raw JSON — just like the create and view commands. This makes it easier to build bulk operations in shell scripts, e.g.:

jira issue list --jql '"Epic Link" = PRJ-123 AND assignee = jdoe' --raw `
    | ConvertFrom-Json `
    | select -ExpandProperty key `
    | %{
        jira issue assign $_ jsmith
    }

jira issue list --jql '"Epic Link" = PRJ-123 AND assignee = jdoe' --raw \
    | jq -r '.[].key' \
    | while read -r ISSUE; do
        jira issue assign $ISSUE jsmith
    done