use "creature/pkg-active" manage packages manually

- replace "add-pkg-in-pkg-dir" (recursive load-path scanning) with a
  central "creature/pkgs" registry that handles load path, autoloads,
  info dirs and dependencies
- adapt all init-*.el files to the new activation function
- add a top-level Makefile to byte-compile site-lisp packages
- remove unused "emacs-kv" and "emacs-db" submodules

lisp/init-plantuml.el

@@ -1,9 +1,8 @@
 ;; -*- coding: utf-8; lexical-binding: t; -*-
 
 (require 'init-package)
-(add-pkg-in-pkg-dir "plantuml-mode")
-(add-pkg-in-pkg-dir "dash")
-(add-pkg-in-pkg-dir "deflate")
+
+(creature/pkg-active 'plantuml-mode)
 
 (autoload 'plantuml-mode "plantuml-mode" "" t)
 (add-to-list 'auto-mode-alist '("\\.\\(plantuml\\|pum\\|plu\\)\\'" . plantuml-mode))