refactor: retire unreferenced modules to an archive directory

A reachability sweep from init.el found eight .el files that nothing in the config loads or references. I moved them under archive/ (off the load-path, still tracked in git) so they stay readable and restorable rather than deleted. archive/README.org records the rule (every .el outside archive/ should be actively used) and why each file was retired.

I retired show-kill-ring, duet-config, and mu4e-org-contacts-setup from modules/, and eplot, profile-dotemacs, titlecase, titlecase-data, and edit-indirect from custom/. Retiring show-kill-ring also removed the orphaned M-K -> M-S-k translation in keyboard-compat, which had left M-K a dead key. Its tests now assert seventeen translations and guard M-K's absence.

1 files changed, 19 insertions, 0 deletions

diff --git a/archive/modules/duet-config.el b/archive/modules/duet-config.el
new file mode 100644
index 00000000..2dc7ad2e
--- /dev/null
+++ b/archive/modules/duet-config.el
@@ -0,0 +1,19 @@
+;;; duet-config.el --- DUET dual-pane commander configuration -*- lexical-binding: t -*-
+
+;;; Commentary:
+;; Personal configuration glue for the DUET package, developed locally at
+;; ~/code/duet.  Keybindings, defcustom values, and connection storage live
+;; here; the package itself stays free of personal opinions.
+;;
+;; Not yet required from init.el — DUET is a pre-alpha skeleton.  Wire it in
+;; once Stage 1 provides usable commands.
+
+;;; Code:
+
+(use-package duet
+  :load-path "~/code/duet"
+  :ensure nil
+  :commands (duet))
+
+(provide 'duet-config)
+;;; duet-config.el ends here