chore(core/compile): add disabled setup for compile-angel

Once kinks have been worked out, we can re-enable it again.

core/siren-core-compile.el

@@ -0,0 +1,44 @@
+;;; siren-core-compile.el --- jimeh's Emacs Siren: Compilation.
+
+;;; Commentary:
+
+;; Elisp byte compilation and native compilation.
+
+;;; Code:
+
+;; TODO: Investigate why vertico--exhibit triggers require calls that
+;; compile-angel intercepts and slows down upto 2 seconds per keystroke when
+;; filtering M-x commands.
+
+;; Use compile-angel to automatically recompile Emacs Lisp files when
+;; they are saved.
+;; (use-package compile-angel
+;;   :demand t
+;;   ;; Do not enable compile-angel-on-save-local-mode by default, as it
+;;   ;; byte-compiles all *.el files, which causes them to be native compiled too.
+;;   ;; :hook
+;;   ;; (emacs-lisp-mode . compile-angel-on-save-local-mode)
+
+;;   :custom
+;;   (compile-angel-enable-byte-compile t)
+;;   (compile-angel-enable-native-compile t)
+;;   (compile-angel-excluded-files-regexps '("/\\.dir-config\\.el$"))
+;;   (compile-angel-predicate-function 'siren-compile-angel-predicate-function)
+;;   (compile-angel-verbose nil)
+
+;;   :preface
+;;   (defun siren-compile-angel-predicate-function (el-file)
+;;     "Determine if compile-angel should compile EL-FILE."
+;;     (let ((file-name (file-name-nondirectory el-file))
+;;           (abs-emacs-dir (expand-file-name user-emacs-directory)))
+;;       ;; TODO: Investigate loading errors when *.el files from my config are
+;;       ;; native compiled.
+;;       (and (not (string-equal "init.el" file-name))
+;;            (not (string-match-p "\\`siren-.*\\.el\\'" file-name))
+;;            (not (string-equal (file-name-directory el-file) abs-emacs-dir)))))
+
+;;   :config
+;;   (compile-angel-on-load-mode))
+
+(provide 'siren-core-compile)
+;;; siren-core-compile.el ends here

core/siren-core-init.el

@@ -51,6 +51,7 @@
 (require 'siren-core-packages)
 (require 'siren-core-package-overrides)
 (require 'siren-core-performance)
+(require 'siren-core-compile)
 (require 'siren-core-keybinds)
 (require 'siren-core-env)
 (require 'siren-core-ui)