refactor(system-utils): major refactoring / adding tests

Theme:
Modularize system-utilities into separate modules.
Clean up any typos, buts, and unused variables.
Add some initial ERT tests for new modules created.

Changes:
- Extract file handling into its own module (file-config)
- Extract keyboard macro management into its own module (keyboard-macros)
- Extract buffer burying (instead of killing) into its own module (undead-buffers)
- Extract all date/time config into its own module (chrono-tools)
- Moved keybinding discovery functionality and help into keybindings module
- Combine flyspell and abbrev (spell-check and autocorrect) to flyspell-and-abbrev.el
- Rename epa-config.el to auth-config.el for auth-source and epa settings.
- Refactor `cj/kill-other-window` for more accurate buffer handling.
- Include "*ert*" in the default bury (don't kill) list as killing it kills test runs.
- Bind C-c M-m to inhibit-mouse-mode
- Remove the unused ledger-file variable in user-constants.el.
- Removed obsolete C-x x m, C-x x r, and C-x x d key mappings.
- C-; b r to call cj/rename-buffer-and-file instead of typo’d function
- Other purely cosmetic comment changes to system-utils.el
ERT tests:
- Rename ERT test definitions to include module scopes (file-config, keyboard-macros)
- Add an ERT test for the timer bell's existence.
- Add ERT tests to cover `cj/kill-buffer-or-bury-alive`, prefix-arg behavior, window-killing commands, and bulk operations.
- Add test `authinfo-file` exists Missing authinfo triggers a debug message
- Add test that `gpg2` executable is on the user’s PATH
- Remove outdated authinfo test.
- Add “Run these tests” note where missing.

1 files changed, 62 insertions, 0 deletions

diff --git a/modules/chrono-tools.el b/modules/chrono-tools.el
new file mode 100644
index 00000000..ae0592f8
--- /dev/null
+++ b/modules/chrono-tools.el
@@ -0,0 +1,62 @@
+;;; chrono-tools.el --- Config for Date and Time-Related Utils -*- lexical-binding: t; -*-
+;; author Craig Jennings <c@cjennings.net>
+;;; Commentary:
+;;
+;; This module centralizes configuration for Emacs time-related tools:
+;;
+;; – world-clock: predefined city list and custom time format
+;; – calendar: quick navigation keybindings by day, month, and year
+;; – tmr: lightweight timer setup with sounds, notifications, and history
+;;
+;;; Code:
+
+(use-package time
+  :ensure nil ;; built-in
+  :defer 0.5
+  :bind ("C-x c" . world-clock)
+  :config
+  (setq world-clock-list
+		'(("Pacific/Honolulu"    " Honolulu")
+		  ("America/Los_Angeles" " San Francisco, LA")
+		  ("America/Chicago"     " Chicago, New Orleans")
+		  ("America/New_York"    " New York, Boston")
+		  ("Etc/UTC"             " UTC =================")
+		  ("Europe/London"       " London, Lisbon")
+		  ("Europe/Paris"        " Paris, Berlin, Rome")
+		  ("Europe/Athens"       " Athens, Istanbul, Moscow")
+		  ("Asia/Kolkata"        " India")
+		  ("Asia/Shanghai"       " Shanghai, Singapore")
+		  ("Asia/Tokyo"          " Tokyo, Seoul")))
+  (setq world-clock-time-format " %a, %d %b @ %I:%M %p %Z"))
+
+(use-package calendar
+  :ensure nil ;; built-in
+  :defer 0.5
+  :bind (("M-#" . calendar)
+		 :map calendar-mode-map
+		 (","   . calendar-backward-day)
+		 ("."   . calendar-forward-day)
+		 ("<"   . calendar-backward-month)
+		 (">"   . calendar-forward-month)
+		 ("M-," . calendar-backward-year)
+		 ("M-." . calendar-forward-year)))
+
+(use-package tmr
+  :defer 0.5
+  :bind ("M-t" . tmr-prefix-map)
+  :config
+  (setq tmr-sound-file "/usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga"
+		tmr-notification-urgency 'normal
+		tmr-descriptions-list 'tmr-description-history))
+
+
+(provide 'chrono-tools)
+;;; chrono-tools.el ends here.
+
+;; --------------------------------- ERT Tests ---------------------------------
+;; Run these tests with M-x ert RET t RET
+
+(ert-deftest chrono-tools/tmr-sound-file-exists ()
+  "Test that `tmr-sound-file` points to an existing file."
+  (require 'tmr)
+  (should (file-exists-p tmr-sound-file)))