chore: add example plugin

Author: saitho

example/go.mod

@@ -0,0 +1,7 @@
+module github/getstackhead/pluginlib/example
+
+go 1.17
+
+require github.com/getstackhead/pluginlib v0.0.0
+
+replace github.com/getstackhead/pluginlib => ../

example/go.sum

@@ -0,0 +1,31 @@
+package main
+
+import "fmt"
+import "github.com/getstackhead/pluginlib"
+
+type MyPlugin struct {
+}
+
+func (p MyPlugin) GetConfig() pluginlib.PluginConfig {
+	return pluginlib.PluginConfig{
+		Name:        "Test",
+		Description: "This is an example StackHead Proxy plugin",
+		Version:     "0.0.0-dev",
+		Author:      "Mario Lubenka",
+		PluginType:  pluginlib.PluginType.PROXY,
+	}
+}
+
+func (p MyPlugin) Deploy(project pluginlib.Project) {
+	fmt.Println("Hello " + project.Name)
+}
+
+func (p MyPlugin) Destroy(project pluginlib.Project) {
+	fmt.Println("Bye " + project.Name)
+}
+
+func (p MyPlugin) Setup() {
+	fmt.Println("Setup...")
+}
+
+var Plugin MyPlugin

example/main.go

@@ -0,0 +1,19 @@
+package main_test
+
+import (
+	"testing"
+
+	"github.com/getstackhead/pluginlib"
+)
+
+func TestPluginLoading(t *testing.T) {
+	loadedPlugin, err := pluginlib.LoadPlugin("./plugin_myplugin.so")
+	if err != nil {
+		t.Fatal("Unable to load plugin. Error occurred: " + err.Error())
+		return
+	}
+	if loadedPlugin == nil {
+		t.Fatal("Unable to load plugin. Plugin is nil")
+		return
+	}
+}