Unified plugin handling

src/plugins/filer_local/filer_local.cpp

@@ -1,4 +1,5 @@
-#include "filer_plugin.h"
+#include "plugin.h"
+#include "filer.h"
 #include <iostream>
 #include <fstream>
 #include <string>
@@ -8,7 +9,7 @@
  
 namespace fs = std::filesystem;
 
-class LocalFiler : public Filer {
+class LocalFiler : public IPlugin, public Filer {
 public:
 	LocalFiler() {}
 	
@@ -371,4 +372,4 @@ private:
 	char type = 'I';
 };
 
-IMPLEMENT_FILER_PLUGIN(LocalFiler, "local", "Local filesystem implementation", "1.0.0")
+IMPLEMENT_PLUGIN(LocalFiler, Filer, "local", "Local filesystem implementation", "1.0.0")