chore(skills): add Nightwatch and MCP agent skills

Add Nightwatch configuration guidance and MCP development skill docs across agent integrations, and refresh existing Laravel skill references.

.cursor/skills/tailwindcss-development/SKILL.md

@@ -116,4 +116,4 @@ If existing pages and components support dark mode, new pages and components mus
 - Using `@tailwind` directives instead of `@import "tailwindcss"`
 - Trying to use `tailwind.config.js` instead of CSS `@theme` directive
 - Using margins for spacing between siblings instead of gap utilities
-- Forgetting to add dark mode variants when the project uses dark mode
+- Forgetting to add dark mode variants when the project uses dark mode