vanadium: move xmonad config

.config/xmonad/leanamonad.cabal

@@ -1,34 +0,0 @@
-cabal-version:      3.0
-name:               leanamonad
-version:            0.1.0.0
-description:        Leana monad go brrr
-author:             Léana 江
-maintainer:         leana.jiang+git@icloud.com
-build-type:         Simple
-
-common common
-  ghc-options:
-    -Wall -Wcompat -Widentities -Wincomplete-record-updates
-    -Wincomplete-patterns -Wincomplete-uni-patterns
-    -Wredundant-constraints -Werror=missing-fields
-  build-depends:
-      base
-    , unix
-    , xmonad
-    , xmonad-contrib
-    , containers
-    , X11
-  default-language: GHC2021
-
-library
-  import: common
-  hs-source-dirs: lib
-  exposed-modules:
-    Leanamonad.Layouts.ReflectMsg
-    Leanamonad.GreekChar
-
-executable leanamonad
-  import: common
-  main-is: xmonad.hs
-  build-depends:
-    leanamonad