refactor(emacs-pkgs): Extract term-switcher into separate emacs pkg

tools/emacs/config/term-setup.el

@@ -1,36 +0,0 @@
-;; Utilities for X11 terminal buffers.
-
-(defvar x11-terminal-program "gnome-terminal"
-  "Which X11 terminal application to use.")
-
-(defvar x11-terminal-buffer-prefix "Term"
-  "String prefix for X11 terminal buffer names.")
-
-(defun open-or-create-terminal-buffer (buffer-name)
-  "Switch to the buffer with BUFFER-NAME or create a new buffer
-  running the configured X11 terminal."
-  (let ((buffer (get-buffer buffer-name)))
-    (if (not buffer)
-        (run-external-command x11-terminal-program)
-      (switch-to-buffer buffer))))
-
-(defun is-terminal-buffer (buffer)
-  "Determine whether BUFFER runs an X11 terminal."
-  (and (equal 'exwm-mode (buffer-local-value 'major-mode buffer))
-       (s-starts-with? x11-terminal-buffer-prefix (buffer-name buffer))))
-
-(defun counsel-switch-to-terminal ()
-  "Switch to an X11 terminal buffer, or create a new one."
-  (interactive)
-  (let ((terms (-map #'buffer-name
-                     (-filter #'is-terminal-buffer (buffer-list)))))
-    (if terms
-        (ivy-read "Switch to terminal buffer: "
-                  (cons "New terminal" terms)
-                  :caller 'counsel-switch-to-terminal
-                  :preselect (s-concat "^" x11-terminal-buffer-prefix)
-                  :require-match t
-                  :action #'open-or-create-terminal-buffer)
-      (run-external-command x11-terminal-program))))
-
-(provide 'term-setup)