Add support for init.lua file in ~/.config/micro

cmd/micro/plugin.go

@@ -3,6 +3,7 @@ package main
 import (
 	"errors"
 	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/layeh/gopher-luar"
@@ -131,4 +132,10 @@ func LoadPlugins() {
 			loadedPlugins = append(loadedPlugins, pluginName)
 		}
 	}
+
+	if _, err := os.Stat(configDir + "/init.lua"); err == nil {
+		if err := L.DoFile(configDir + "/init.lua"); err != nil {
+			TermMessage(err)
+		}
+	}
 }