Move inputs and inputs' pkgs attrs into flakelite attr

This will prevent name collisions, and be more cohesive as more is added
to the flakelite attr.

default.nix

@@ -13,12 +13,12 @@ let
 
   baseModule = src: inputs: root: {
     withOverlay = final: prev: {
-      inherit inputs;
-      inputs' = mapAttrs
-        (_: mapAttrs
-          (_: v: v.${prev.system} or { }))
-        inputs;
       flakelite = exports // {
+        inherit inputs;
+        inputs' = mapAttrs
+          (_: mapAttrs
+            (_: v: v.${prev.system} or { }))
+          inputs;
         meta = {
           platforms = root.systems;
         } // optionalAttrs (root ? description) {