refactor(users/glittershark): Rename to grfn

Rename my //users directory and all places that refer to glittershark to
grfn, including nix references and documentation.

This may require some extra attention inside of gerrit's database after
it lands to allow me to actually push things.

Change-Id: I4728b7ec2c60024392c1c1fa6e0d4a59b3e266fa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2933
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: glittershark <grfn@gws.fyi>

users/glittershark/xanthous/src/Xanthous/Entities/Creature.hs

@@ -1,92 +0,0 @@
-{-# LANGUAGE RecordWildCards #-}
-{-# LANGUAGE TemplateHaskell #-}
---------------------------------------------------------------------------------
-module Xanthous.Entities.Creature
-  ( -- * Creature
-    Creature(..)
-    -- ** Lenses
-  , creatureType
-  , hitpoints
-  , hippocampus
-
-    -- ** Creature functions
-  , newWithType
-  , damage
-  , isDead
-  , visionRadius
-
-    -- * Hippocampus
-  , Hippocampus(..)
-    -- ** Lenses
-  , destination
-    -- ** Destination
-  , Destination(..)
-  , destinationFromPos
-    -- *** Lenses
-  , destinationPosition
-  , destinationProgress
-  ) where
---------------------------------------------------------------------------------
-import           Xanthous.Prelude
---------------------------------------------------------------------------------
-import           Test.QuickCheck
-import           Test.QuickCheck.Arbitrary.Generic
-import           Data.Aeson.Generic.DerivingVia
-import           Data.Aeson (ToJSON, FromJSON)
---------------------------------------------------------------------------------
-import           Xanthous.AI.Gormlak
-import           Xanthous.Entities.RawTypes hiding
-                 (Creature, description, damage)
-import qualified Xanthous.Entities.RawTypes as Raw
-import           Xanthous.Game.State
-import           Xanthous.Data
-import           Xanthous.Data.Entities
-import           Xanthous.Entities.Creature.Hippocampus
---------------------------------------------------------------------------------
-
-data Creature = Creature
-  { _creatureType :: !CreatureType
-  , _hitpoints    :: !Hitpoints
-  , _hippocampus  :: !Hippocampus
-  }
-  deriving stock (Eq, Show, Ord, Generic)
-  deriving anyclass (NFData, CoArbitrary, Function)
-  deriving Draw via DrawRawCharPriority "_creatureType" 1000 Creature
-  deriving (ToJSON, FromJSON)
-       via WithOptions '[ FieldLabelModifier '[Drop 1] ]
-                       Creature
-instance Arbitrary Creature where arbitrary = genericArbitrary
-makeLenses ''Creature
-
-instance HasVisionRadius Creature where
-  visionRadius = const 50 -- TODO
-
-instance Brain Creature where
-  step = brainVia GormlakBrain
-  entityCanMove = const True
-
-instance Entity Creature where
-  entityAttributes _ = defaultEntityAttributes
-    & blocksObject .~ True
-  description = view $ creatureType . Raw.description
-  entityChar = view $ creatureType . char
-  entityCollision = const $ Just Combat
-
---------------------------------------------------------------------------------
-
-newWithType :: CreatureType -> Creature
-newWithType _creatureType =
-  let _hitpoints = _creatureType ^. maxHitpoints
-      _hippocampus = initialHippocampus
-  in Creature {..}
-
-damage :: Hitpoints -> Creature -> Creature
-damage amount = hitpoints %~ \hp ->
-  if hp <= amount
-  then 0
-  else hp - amount
-
-isDead :: Creature -> Bool
-isDead = views hitpoints (== 0)
-
-{-# ANN module ("Hlint: ignore Use newtype instead of data" :: String) #-}