feature: Kill support in the UI (#297)

* feature: Kill command API (wip)

* feature: Kill support in the UI

internal/executor/executor.go

@@ -74,6 +74,7 @@ type InternalLogEntry struct {
 	ExecutionStarted    bool
 	ExecutionFinished   bool
 	ExecutionTrackingID string
+	Process             *os.Process
 
 	/*
 		The following 3 properties are obviously on Action normally, but it's useful
@@ -382,6 +383,8 @@ func stepExec(req *ExecutionRequest) bool {
 
 	runerr := cmd.Start()
 
+	req.logEntry.Process = cmd.Process
+
 	waiterr := cmd.Wait()
 
 	req.logEntry.ExitCode = int32(cmd.ProcessState.ExitCode())