docs: generate api docs

docs/nix/shell.nix

@@ -1 +1,16 @@
-{ docs, pkgs, ... }: pkgs.mkShell { inputsFrom = [ docs ]; }
+{
+  docs,
+  pkgs,
+  module-docs,
+  ...
+}:
+pkgs.mkShell {
+  inputsFrom = [ docs ];
+  shellHook = ''
+    mkdir -p ./site/reference
+    cp -af ${module-docs}/* ./site/reference/
+    chmod +w ./site/reference/*
+
+    echo "Generated API documentation in './site/reference/' "
+  '';
+}