Allow eating edible items

Add menu support to the prompt system, and an "Eat" command that prompts
for an item to eat and eats the item the character specifies, restoring
an amount of hitpoints configurable via the item raw type.

xanthous.cabal

@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: ad4acf50f6be0dc7ae6c68d9920b61c2d32b5d759aae7311a124d159b4a9bc7f
+-- hash: ac15bf59fd57f7a0bc23f010aec83824f819592494145cbce3e1db36e23f1107
 
 name:           xanthous
 version:        0.1.0.0
@@ -103,6 +103,7 @@ library
     , reflection
     , stache
     , tomland
+    , vector
     , vty
     , yaml
   default-language: Haskell2010
@@ -183,6 +184,7 @@ executable xanthous
     , reflection
     , stache
     , tomland
+    , vector
     , vty
     , xanthous
     , yaml
@@ -202,6 +204,7 @@ test-suite test
       Xanthous.OrphansSpec
       Xanthous.Util.GraphicsSpec
       Xanthous.Util.InflectionSpec
+      Xanthous.UtilSpec
       Paths_xanthous
   hs-source-dirs:
       test
@@ -244,6 +247,7 @@ test-suite test
     , tasty-hunit
     , tasty-quickcheck
     , tomland
+    , vector
     , vty
     , xanthous
     , yaml