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-rime.el

@@ -1,11 +1,10 @@
 ;; -*- coding: utf-8; lexical-binding: t; -*-
 
 (require 'init-package)
-(add-pkg-in-pkg-dir "emacs-rime")
-(add-pkg-in-pkg-dir "dash")
-(add-pkg-in-pkg-dir "posframe")
 
-(require 'lazy-load)
+(creature/pkg-active 'rime)
+(creature/pkg-active 'lazy-load)
+
 (require 'rime)