WIP: Replace job execution with runner delegation

Server now accepts runner connections via websockets. Jobs
will be delegated to these runners. This is currently a WIP,
as it is still hardcoded to use the first available runner.

config/config.go

@@ -16,10 +16,15 @@ type Job struct {
 	Cron    *string
 }
 
+type Runner struct {
+	Secret string
+}
+
 type Config struct {
 	Address string
 	Port    int
 	Jobs    map[string]Job
+	Runners map[string]Runner
 }
 
 func GetConfig() (config.Config[Config], error) {
@@ -30,6 +35,7 @@ func GetConfig() (config.Config[Config], error) {
 			Address: "127.0.0.1",
 			Port:    45420,
 			Jobs:    make(map[string]Job),
+			Runners: make(map[string]Runner),
 		},
 	}