Add back .cabal file (#47)

Needed for downstream Nix users.

.gitignore

@@ -2,4 +2,3 @@
 result
 dist-newstyle
 hell-linux-x86-64bit
-hell.cabal

hell.cabal

@@ -0,0 +1,44 @@
+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.36.0.
+--
+-- see: https://github.com/sol/hpack
+
+name:           hell
+version:        0
+author:         Chris Done
+maintainer:     Chris Done
+copyright:      2023 Chris Done
+license:        BSD3
+build-type:     Simple
+
+executable hell
+  main-is: src/Hell.hs
+  other-modules:
+      Paths_hell
+  ghc-options: -Wall -Wno-missing-pattern-synonym-signatures -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      QuickCheck
+    , aeson
+    , async
+    , base >=4.17.2.1
+    , bytestring
+    , constraints
+    , containers
+    , directory
+    , ghc-prim
+    , haskell-src-exts
+    , hspec
+    , lucid
+    , mtl
+    , optparse-applicative
+    , syb
+    , tagged
+    , template-haskell
+    , text
+    , th-lift
+    , th-orphans
+    , typed-process
+    , unliftio
+    , vector
+  default-language: Haskell2010