* fix: support /plugins slash command in resume mode
Move SlashCommand::Plugins out of the 'unsupported resumed slash
command' catch-all and add a handler arm in run_resume_command that
calls handle_plugins_slash_command for list/help actions.
Mutation actions (install/uninstall/enable/disable) are rejected with
a clear error since there is no runtime to reload in resume mode.
Add /plugins coverage to resumed_inventory_commands test in
output_format_contract.rs: kind, action, reload_runtime, target.
Before: claw --resume session.jsonl /plugins --output-format json
-> {error: 'unsupported resumed slash command', type: 'error'}, exit 1
After: claw --resume session.jsonl /plugins --output-format json
-> {kind: 'plugin', action: 'list', ...}, exit 0
* style: cargo fmt line wrap in run_resume_command plugins handler
* fix: block /plugins update in resume mode, fix comment
Address REQUEST_CHANGES from OMX review:
1. Add 'update' to the blocked mutation actions in resume mode
(previously only install/uninstall/enable/disable were blocked)
2. Fix comment: 'Only list is supported' instead of 'Only list/help'
since /plugins help doesn't actually parse as a valid action
* style: cargo fmt after conflict resolution
65aa559733