feat: Implement resource:limit and resource:reserve

Also add the install and post-delete hooks

plugins/resource/src/triggers/install/install.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/dokku/dokku/plugins/common"
+)
+
+// runs the install step for the resource plugin
+func main() {
+	if err := common.PropertySetup("resource"); err != nil {
+		common.LogFail(fmt.Sprintf("Unable to install the resource plugin: %s", err.Error()))
+	}
+}

plugins/resource/src/triggers/post-delete/post-delete.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"flag"
+
+	"github.com/dokku/dokku/plugins/common"
+)
+
+// destroys the resource property for a given app container
+func main() {
+	flag.Parse()
+	appName := flag.Arg(0)
+
+	err := common.PropertyDestroy("resource", appName)
+	if err != nil {
+		common.LogFail(err.Error())
+	}
+}