Restructures Doom's primary core files and entry points to prepare for
backports (from the new CLI) coming soon.
- Removes $EMACSDIR/init.el.
- Doom configures Emacs to ignore ~/.emacs and ~/_emacs files.
- Doom's bootstrapper for interactive sessions was moved out of core.el
and doom-initialize into doom-start.el. This change is preparation for
Doom's new profile system (coming soon™️), where this bootstrapper
will be dynamically generated.
- core.el and early-init.el have been reorganized, comment headers moved
around, and comments updated to reflect these changes.
