jooby-apt: add routerPrefix/Suffix as supported options and add doc about it

Author: jknack

docs/asciidoc/mvc-api.adoc

@@ -917,6 +917,17 @@ on them (mostly annotations processors).
 |boolean
 |false
 |Set the Route.mvcMethod when true.
+
+|jooby.routerPrefix
+|string
+|
+|Prefix for generated class
+
+|jooby.routerSuffix
+|string
+|_
+|Suffix for generated class
+
 |=== 
 
 ==== Setting options

modules/jooby-apt/src/main/java/io/jooby/apt/JoobyProcessor.java

@@ -37,6 +37,8 @@
   SERVICES,
   MVC_METHOD,
   RETURN_TYPE,
+  ROUTER_PREFIX,
+  ROUTER_SUFFIX,
   SKIP_ATTRIBUTE_ANNOTATIONS
 })
 @SupportedSourceVersion(SourceVersion.RELEASE_17)