The 'Commands:' section of 'specify extension info' for a locally installed
extension printed each command in its manifest dotted form
(e.g. speckit.jira.sync). Cline and Forge register hyphenated command names
(/speckit-jira-sync), so on those projects the displayed names did not match
what the user actually invokes.
Format each name through the active agent's command-name formatter, mirroring
the parity 'extension add' already applies to its 'Provided commands' listing
(#3669) and completing the Forge/Cline command-name parity from #3641/#3642.
Adds a regression test asserting the hyphenated form appears (and the dotted
form does not) for a Forge project.
e6a3ccfb27