Kakoune restructure

kak/modules/filetypes.kak

@@ -0,0 +1,19 @@
+declare-option -hidden str-list filetype_modules
+
+define-command -hidden -params 1 filetype-module-load %{
+    evaluate-commands %sh{
+        ft="$1"
+        file="$kak_config/filetypes/$ft.kak"
+        [ -f "$file" ] || exit 0
+        for loaded in $kak_opt_filetype_modules; do
+            [ "$loaded" = "$ft" ] && exit 0
+        done
+        printf 'set-option -add global filetype_modules %%{%s}\n' "$ft"
+        printf 'source %%{%s}\n' "$file"
+        printf 'try %%{ filetype-%s }\n' "$ft"
+    }
+}
+
+hook global WinSetOption filetype=(.+) %{
+    filetype-module-load %val{hook_param_capture_1}
+}