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/version-control/siren-diff-hl.el

@@ -0,0 +1,19 @@
+;;; siren-diff-hl.el --- jimeh's Emacs Siren: diff-hl configuration.
+
+;;; Commentary:
+
+;; Basic configuration for diff-hl.
+
+;;; Code:
+
+(use-package diff-hl
+  :demand
+  :hook ((dired-mode . diff-hl-dired-mode)
+         (magit-post-refresh-hook . diff-hl-magit-post-refresh))
+
+  :config
+  (global-diff-hl-mode +1)
+  (diff-hl-flydiff-mode +1))
+
+(provide 'siren-diff-hl)
+;;; siren-diff-hl.el ends here

modules/version-control/siren-ediff.el

@@ -0,0 +1,25 @@
+;;; siren-ediff.el --- jimeh's Emacs Siren: ediff configuration.
+
+;;; Commentary:
+
+;; Basic configuration for ediff.
+
+;;; Code:
+
+(defun ediff-copy-both-to-C ()
+  "Copy both A and B variants to C."
+  (interactive)
+  (ediff-copy-diff
+   ediff-current-difference nil 'C nil
+   (concat
+    (ediff-get-region-contents ediff-current-difference 'A ediff-control-buffer)
+    (ediff-get-region-contents ediff-current-difference 'B ediff-control-buffer))))
+
+(defun add-B-to-ediff-mode-map ()
+  "Assign B key to copy both A and B variants to C."
+  (define-key ediff-mode-map "B" 'ediff-copy-both-to-C))
+
+(add-hook 'ediff-keymap-setup-hook 'add-B-to-ediff-mode-map)
+
+(provide 'siren-ediff)
+;;; siren-ediff.el ends here

modules/version-control/siren-git-timemachine.el

@@ -0,0 +1,15 @@
+;;; siren-git-timemachine.el --- jimeh's Emacs Siren: git-timemachine configuration.
+
+;;; Commentary:
+
+;; Basic configuration for git-timemachine.
+
+;;; Code:
+
+(use-package git-timemachine
+  :defer t
+  :init
+  (defalias 'gt 'git-timemachine))
+
+(provide 'siren-git-timemachine)
+;;; siren-git-timemachine.el ends here

modules/version-control/siren-github.el

@@ -0,0 +1,13 @@
+;;; siren-github.el --- jimeh's Emacs Siren: Github related stuff.
+
+;;; Commentary:
+
+;; Basic configuration for various Github related packages.
+
+;;; Code:
+
+(use-package github-browse-file
+  :defer t)
+
+(provide 'siren-github)
+;;; siren-github.el ends here

modules/version-control/siren-magit.el

@@ -0,0 +1,51 @@
+;;; siren-magit.el --- jimeh's Emacs Siren: magit configuration.
+
+;;; Commentary:
+
+;; Basic configuration for magit.
+
+;;; Code:
+
+(require 'siren-fci)
+(require 'siren-flyspell)
+
+(use-package magit
+  :bind
+  ("C-x g". magit-status)
+
+  :hook
+  (siren-magit-mode . siren-magit-mode-setup)
+  (git-commit-mode . siren-git-commit-mode-setup)
+
+  :init
+  (defalias 'bl 'magit-blame)
+
+  (defun siren-magit-mode-setup ())
+
+  (defun siren-git-commit-mode-setup ()
+    (subword-mode)
+    (setq tab-width 2)
+    (fci-mode t)
+    ;; (flyspell-mode) ;; in GUI causes git-commit-mode to lock up emacs
+    (linum-mode t)
+    (auto-fill-mode))
+
+  :config
+  (require 'magit)
+
+  (setq magit-completing-read-function 'magit-ido-completing-read
+        magit-status-buffer-switch-function 'switch-to-buffer
+        magit-bury-buffer-function 'bury-buffer
+        magit-restore-window-configuration nil
+        magit-revert-buffers 'silent
+        magit-default-tracking-name-function 'magit-default-tracking-name-branch-only
+        magit-repository-directories '("~/Projects" "~/src" "~/.emacs.d" "~/.dotfiles")
+        magit-display-buffer-function 'magit-display-buffer-same-window-except-diff-v1))
+
+(use-package magit-gh-pulls
+  :hook (magit-mode . turn-on-magit-gh-pulls)
+  :config
+  (setq gh-use-local-git-config t))
+
+(provide 'siren-magit)
+;;; siren-magit.el ends here