Adds more window title options (#169)

* Adds options for windowtitle to toggle: custom title, icon and truncation

* Implements window title toggles: showIcon and showCustomTitle; Adds a new default title function and truncates it if specified

* incorporate new show label option into window title

* fix window title spacing to work with new styles

* allows truncation for custom window titles

* allows custom window title icon with default window title

* add option to show the window class name or title; refactor for consistency and easier readability

* remove redundant custom window title check

options.ts

@@ -814,8 +814,13 @@ const options = mkOptions(OPTIONS, {
             icon: opt("󰣇"),
         },
         windowtitle: {
+            custom_title: opt(true),
             title_map: opt([]),
+            class_name: opt(true),
             label: opt(true),
+            icon: opt(true),
+            truncation: opt(true),
+            truncation_size: opt(50),
         },
         workspaces: {
             show_icons: opt(false),