home: create 'modules/home' folder

Consolidating all modules under the same path, to clear out the
top-level directory.

modules/home/vim/ftdetect/kbuild.lua

@@ -0,0 +1,6 @@
+-- Kbuild is just a Makefile under a different name
+vim.filetype.add({
+    filename = {
+        ["Kbuild"] = "make",
+    },
+})