devtools/hackdoc: init

This is hackdoc, a documentation rendering tool for monorepos.

This is the first code iteration, that can only serve from a local git
checkout.

The code is incomplete, and is WIP.

Change-Id: I68ef7a991191c1bb1b0fdd2a8d8353aba642e28f
diff --git a/hackdoc.toml b/hackdoc.toml
new file mode 100644
index 0000000..83eacea
--- /dev/null
+++ b/hackdoc.toml
@@ -0,0 +1,7 @@
+default_index = ["index.md", "readme.md", "README.md"]
+
+[template.default]
+sources = [
+    "//devtools/hackdoc/tpl/base.html",
+    "//devtools/hackdoc/tpl/default.html",
+]