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/ripgrep/ripgreprc

@@ -0,0 +1,11 @@
+--max-columns-preview
+
+--type-add
+web:*.{html,css,js,jsx,ts,tsx}*
+
+--type-add
+text:*.{md,mdx,txt}*
+
+--glob=!git/*
+
+--smart-case