feat!: add W Engine plugin (#81)

* feat!: add W Engine plugin

* feat!: add en translation

* fix: rm useless line

* feat!: add preview window in a pannel

* fix: rm no dependencies tools

* feat!: update thumbnail with new image

* feat: add screen choose with selector and add id check for warn string command folder

* docs: add dependencies on toml and read me

* fix: rm pkill and use kill

* feat!: add multiple path check, default output, select where set wallpaper

* feat!: rm debug notif

* docs: add new action documentation

* feat!: add new service for good restart (pkill all instance linux-wallpaper and rm all tmp file created by w engine)

* feat!: add check if pid is a linux-wallpaper instance

* docs: add depedencie and new entries

* feat!: support personnal path with json load

* docs: add docs for custom path

* feat!: use new api function for show all wallpaper

* fix: rm useless notify

w-engine/translations/en.json

@@ -0,0 +1,11 @@
+{
+  "plugin_name": "W Engine",
+  "plugin_description": "A widget for Wallpaper Engine. Set wallpaper from Wallpaper Engine with simple click.",
+  "panel": {
+    "apply": "Apply wallpaper {id}",
+    "list_failed": "Could not list Wallpaper Engine wallpapers",
+    "missing_project_json": "No project.json for {name}",
+    "no_wallpapers": "No Wallpaper Engine wallpapers found",
+    "title": "W Engine"
+  }
+}