app/write: major refactor+rewrite

+ Make synosaurus unconditional
+ Move much of +write-mode into its hook
+ Conform README.org to template and expand it
+ Try to guess langtool-language-tool-jar
+ Update init.example.el entry
+ Remove redundant variables
+ Add +write-text-scale & +text-line-spacing variables

modules/app/write/autoload.el

@@ -2,18 +2,19 @@
 
 ;;;###autoload
 (define-minor-mode +write-mode
-  "TODO"
+  "Turns Emacs into a more comfortable writing environment and word processor."
   :init-value nil
   :keymap nil
-  (let ((arg  (if +write-mode +1 -1))
-        (iarg (if +write-mode -1 +1)))
-    (text-scale-set (if +write-mode 2 0))
-    (doom/toggle-line-numbers iarg)
-    (setq-local visual-fill-column-center-text +write-mode)
-    (visual-fill-column-mode arg)
-    (visual-line-mode arg)
-    (when (eq major-mode 'org-mode)
-      (mixed-pitch-mode arg)
-      (+org-pretty-mode arg))
-    (setq line-spacing (if +write-mode 4))))
+  (setq-local visual-fill-column-center-text t)
+  (when +write-text-scale
+    (text-scale-set (if +write-mode 2 0)))
+  (when +write-line-spacing
+    (setq-local line-spacing +write-line-spacing)))
 
+;;;###autoload
+(defun +write|init-org-mode ()
+  "Initializes `org-mode' specific settings for `+write-mode'."
+  (when (eq major-mode 'org-mode)
+    (let ((arg  (if +write-mode +1 -1)))
+      (+org-pretty-mode arg)
+      (org-indent-mode (if +write-mode -1 +1)))))