refactoring of code to support themes and new hellug theme

config.toml

@@ -1,6 +1,7 @@
 baseURL = "https://www.hellug.gr/"
 languageCode = "en-us"
 title = "HELLUG"
+theme = "hellug-bootstrap"
 disableHugoGeneratorInject = true
 
 [mediaTypes."text/gemini"]
@@ -53,8 +54,13 @@ page = [ "HTML", "GEMINI", "gopher"]
     identifier = "meli"
     name = "Μέλη"
     weight = -80
-    
+
   [[menu.main]]
     identifier = "linux"
     name = "Linux"
     weight = -70
+
+  [[menu.main]]
+    identifier = "contact"
+    name = "Επαφή"
+    weight = -60