cmd/hakurei: terminate specified instance

This is theoretically susceptible to the PID race, but such an event is statistically impossible, and not exploitable in the intended use case, regardless.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/dist/comp/_hakurei

@@ -36,6 +36,11 @@ _hakurei_show() {
     'files:files:__hakurei_files'
 }
 
+_hakurei_kill() {
+  _alternative \
+    'instances:domains:__hakurei_instances'
+}
+
 __hakurei_files() {
   _files -g "*.(json|hakurei)"
   return $?
@@ -60,6 +65,7 @@ __hakurei_instances() {
     "run:Load and start container from configuration file"
     "exec:Configure and start a permissive container"
     "show:Show live or local instance configuration"
+    "kill:Terminate an active instance"
     "ps:List active instances"
     "version:Display version information"
     "license:Show full license text"