refactor: improve docusaurus site creation and handling

- Change site.new to always create/overwrite a site
- Add early exit to site.play if no config exists
- Use explicit sitename from docusaurus.config
- Enable openai.play action processing
- Remove debug code and improve struct initialization

lib/web/site/factory.v

@@ -15,12 +15,6 @@ pub mut:
 pub fn new(args FactoryArgs) !&Site {
 	name := texttools.name_fix(args.name)
 
-	// Check if a site with this name already exists
-	if name in websites {
-		// Return the existing site instead of creating a new one
-		return get(name: name)!
-	}
-
 	websites[name] = &Site{
 		siteconfig: SiteConfig{
 			name: name