Majorly re-organize modules

- Split large modules into smaller parts (e.g. siren-text-manipulation)
- Organize modules into high level groups:
  - completion
  - core
  - editor
  - languages
  - linting
  - misc
  - navigation
  - projects
  - spelling
  - text-editing
  - version-control
  - windows
  - workspaces

modules/windows/siren-buffer-move.el

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+;;; siren-buffer-move.el --- jimeh's Emacs Siren: buffer-move
+
+;;; Commentary:
+
+;; Configuration for buffer-move
+
+;;; Code:
+
+(use-package buffer-move
+  :bind
+  ("M-K" . buf-move-down)
+  ("M-I" . buf-move-up)
+  ("M-J" . buf-move-left)
+  ("M-L" . buf-move-right))
+
+(provide 'siren-buffer-move)
+;;; siren-buffer-move.el ends here

modules/windows/siren-windmove.el

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+;;; siren-windmove.el --- jimeh's Emacs Siren: windmove
+
+;;; Commentary:
+
+;; Configuration for windmove.
+
+;;; Code:
+
+(use-package windmove
+  :ensure nil ;; loaded from emacs built-ins
+  :config
+  (global-set-key (kbd "M-k") (siren-ignore-error-wrapper 'windmove-down))
+  (global-set-key (kbd "M-i") (siren-ignore-error-wrapper 'windmove-up))
+  (global-set-key (kbd "M-j") (siren-ignore-error-wrapper 'windmove-left))
+  (global-set-key (kbd "M-l") (siren-ignore-error-wrapper 'windmove-right)))
+
+(provide 'siren-windmove)
+;;; siren-windmove.el ends here

modules/windows/siren-zoom-window.el

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+;;; siren-zoom-window.el --- jimeh's Emacs Siren: zoom-window configuration.
+
+;;; Commentary:
+
+;; Basic configuration for zoom-window.
+
+;;; Code:
+
+(use-package zoom-window
+  :bind
+  ("C-x C-<return>" . zoom-window-zoom)
+
+  :config
+  (setq zoom-window-mode-line-color "#2a1f1f"))
+
+(provide 'siren-zoom-window)
+;;; siren-zoom-window.el ends here