docs: update Zensical theme and markdown configuration (#99)

* docs: update Zensical theme and markdown configuration

* docs: remove unused markdown extension configuration

Author: DevTwilight

zensical.toml

@@ -6,6 +6,9 @@ repo_url = "https://github.com/godot-sdk-integrations/godot-google-play-billing"
 repo_name = "GodotGooglePlayBilling"
 copyright = "Copyright © 2020 Godot Engine Contributors"
 
+use_directory_urls = false
+edit_uri  = "edit/master/docs/"
+
 nav = [
   "index.md",
   "Installation.md",
@@ -26,15 +29,19 @@ features = [
   "navigation.instant",
   "navigation.instant.progress",
   "navigation.top",
-  "search.highlight"
+  "search.highlight",
+  "content.action.edit",
+  "content.action.view"
 ]
 
 [[project.theme.palette]]
 scheme = "default"
 toggle.icon = "lucide/sun"
 toggle.name = "Switch to dark mode"
+media = "(prefers-color-scheme: light)"
 
 [[project.theme.palette]]
 scheme = "slate"
 toggle.icon = "lucide/moon"
 toggle.name = "Switch to light mode"
+media = "(prefers-color-scheme: dark)"