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/build/update-comonad-extras.patch

@@ -1,92 +0,0 @@
-diff --git a/comonad-extras.cabal b/comonad-extras.cabal
-index fc3745a..77a2f0d 100644
---- a/comonad-extras.cabal
-+++ b/comonad-extras.cabal
-@@ -1,7 +1,7 @@
- name:          comonad-extras
- category:      Control, Comonads
--version:       4.0
-+version:       5.0
- x-revision: 1
- license:       BSD3
- cabal-version: >= 1.6
- license-file:  LICENSE
-@@ -34,8 +34,8 @@ library
-   build-depends:
-     array                >= 0.3   && < 0.6,
--    base                 >= 4     && < 4.7,
--    containers           >= 0.4   && < 0.6,
--    comonad              >= 4     && < 5,
-+    base                 >= 4     && < 5,
-+    containers           >= 0.6   && < 0.7,
-+    comonad              >= 5     && < 6,
-     distributive         >= 0.3.2 && < 1,
--    semigroupoids        >= 4     && < 5,
--    transformers         >= 0.2   && < 0.4
-+    semigroupoids        >= 5     && < 6,
-+    transformers         >= 0.5   && < 0.6
-
-   exposed-modules:
-     Control.Comonad.Store.Zipper
-diff --git a/src/Control/Comonad/Store/Pointer.hs b/src/Control/Comonad/Store/Pointer.hs
-index 5044a1e..8d4c62d 100644
---- a/src/Control/Comonad/Store/Pointer.hs
-+++ b/src/Control/Comonad/Store/Pointer.hs
-@@ -41,7 +41,6 @@ module Control.Comonad.Store.Pointer
-   , module Control.Comonad.Store.Class
-   ) where
-
--import Control.Applicative
- import Control.Comonad
- import Control.Comonad.Hoist.Class
- import Control.Comonad.Trans.Class
-@@ -51,27 +50,8 @@ import Control.Comonad.Env.Class
- import Data.Functor.Identity
- import Data.Functor.Extend
- import Data.Array
--
- #ifdef __GLASGOW_HASKELL__
- import Data.Typeable
--instance (Typeable i, Typeable1 w) => Typeable1 (PointerT i w) where
--  typeOf1 diwa = mkTyConApp storeTTyCon [typeOf (i diwa), typeOf1 (w diwa)]
--    where
--      i :: PointerT i w a -> i
--      i = undefined
--      w :: PointerT i w a -> w a
--      w = undefined
--
--instance (Typeable i, Typeable1 w, Typeable a) => Typeable (PointerT i w a) where
--  typeOf = typeOfDefault
--
--storeTTyCon :: TyCon
--#if __GLASGOW_HASKELL__ < 704
--storeTTyCon = mkTyCon "Control.Comonad.Trans.Store.Pointer.PointerT"
--#else
--storeTTyCon = mkTyCon3 "comonad-extras" "Control.Comonad.Trans.Store.Pointer" "PointerT"
--#endif
--{-# NOINLINE storeTTyCon #-}
- #endif
-
- type Pointer i = PointerT i Identity
-@@ -83,6 +63,9 @@ runPointer :: Pointer i a -> (Array i a, i)
- runPointer (PointerT (Identity f) i) = (f, i)
-
- data PointerT i w a = PointerT (w (Array i a)) i
-+#ifdef __GLASGOW_HASKELL__
-+  deriving Typeable
-+#endif
-
- runPointerT :: PointerT i w a -> (w (Array i a), i)
- runPointerT (PointerT g i) = (g, i)
-diff --git a/src/Control/Comonad/Store/Zipper.hs b/src/Control/Comonad/Store/Zipper.hs
-index 3b70c86..decc378 100644
---- a/src/Control/Comonad/Store/Zipper.hs
-+++ b/src/Control/Comonad/Store/Zipper.hs
-@@ -15,7 +15,6 @@
- module Control.Comonad.Store.Zipper
-   ( Zipper, zipper, zipper1, unzipper, size) where
-
--import Control.Applicative
- import Control.Comonad (Comonad(..))
- import Data.Functor.Extend
- import Data.Foldable