initial implementation of terranix for zitadel. SUPER HAPPY, SUPER COOL!!!

lib/strings/default.nix

@@ -0,0 +1,17 @@
+{ lib, ...}:
+let
+  inherit (builtins) isString typeOf;
+  inherit (lib) throwIfNot concatStringsSep splitStringBy toLower map;
+in
+{
+  strings = {
+    toSnakeCase = 
+      str:
+      throwIfNot (isString str) "toSnakeCase only accepts string values, but got ${typeOf str}" (
+        str
+          |> splitStringBy (prev: curr: builtins.match "[a-z]" prev != null && builtins.match "[A-Z]" curr != null) true
+          |> map (p: toLower p)
+          |> concatStringsSep "_"
+      );
+  };
+}