Add schema.sql to create database, add php files and templates for index, entries, exits and search.

src/templates/recherche.tpl

@@ -0,0 +1,5 @@
+{include file="admin/_head.tpl" title="%s"|args:$plugin.nom current="plugin_%s"|args:$plugin.id}
+
+{include file="%s_nav.tpl"|args:$plugin_tpl current="recherche"}
+
+{include file="admin/_foot.tpl"}