refactor: Move Emacs config from system/ to projects/dotemacs/

- Delete deprecated system/ configuration files
- Update projects/dotemacs/modules/ with reorganized config
- Add .opencode/ directory for agent state
- Clean up attachments and unused documentation files

projects/dotemacs/modules/emacs-misc.el

@@ -0,0 +1,27 @@
+(use-package eww
+  :bind* (("M-m g x" . eww)
+          ("M-m g :" . eww-browse-with-external-browser)
+          ("M-m g #" . eww-list-histories)
+          ("M-m g {" . eww-back-url)
+          ("M-m g }" . eww-forward-url))
+  :config
+  (progn
+    (add-hook 'eww-mode-hook 'visual-line-mode)
+    )
+  )
+
+(use-package docker
+  :bind ("C-c d" . docker)
+  )
+
+(use-package chemtable)
+
+(use-package beancount
+  :straight (beancount :type git :host github :repo "beancount/beancount-mode")
+  :config
+  (add-to-list 'auto-mode-alist '("\\.beancount\\'" . beancount-mode))
+  (add-hook 'beancount-mode-hook #'outline-minor-mode)
+  (define-key beancount-mode-map (kbd "C-c C-n") #'outline-next-visible-heading)
+  (define-key beancount-mode-map (kbd "C-c C-p") #'outline-previous-visible-heading)
+  ;; (add-hook 'beancount-mode-hook #'flymake-bean-check-enable)
+  )