feat(nix): nix and back again

I tried Nix, but it had too many downsides so I removed it.

1. Didn't like that all files are immutable and simple config changes
need a complete rebuild.
2. Setting up a new Mac didn't work as smoothly as promised. Not worth
the effort.
3. It sucked a lot to always have to type in the password twice on each
darwin-rebuild
4. It solves problems I never had.

.config/lazygit/config.yml

@@ -0,0 +1,16 @@
+git:
+  overrideGpg: true
+  paging:
+    colorArg: always
+    pager: delta --dark --paging=never syntax-theme=Dracula
+customCommands:
+  - key: "C"
+    command: "git cz c"
+    description: "commit with commitizen"
+    context: "files"
+    loadingText: "opening commitizen commit tool"
+    subprocess: true
+  - key: "W"
+    command: git commit --no-verify
+    context: "global"
+    subprocess: true