meta(aeo): Improve homepage schema and discovery docs

Add visible FAQ and concepts content, strengthen tool-specific integration
guides, and publish a dedicated skills-vs-MCP explainer.

Extend homepage SEO metadata and JSON-LD so the GitHub Pages catalog
better reflects the repository's real positioning and common user
questions.

docs/users/gemini-cli-skills.md

@@ -4,6 +4,10 @@ If you are evaluating **Gemini CLI skills** on GitHub, this repository is a stro
 
 Antigravity Awesome Skills supports Gemini CLI through the `.gemini/skills/` path and combines general engineering playbooks with specialized skills for AI systems, integrations, infrastructure, testing, product, and growth.
 
+## How to use Antigravity Awesome Skills with Gemini CLI
+
+Install into the Gemini skills path, then ask Gemini to apply one skill at a time to a specific task. This works best when you keep the active set small and choose a clear workflow-oriented skill for the job in front of you.
+
 ## Why use this repo for Gemini CLI
 
 - It installs directly into the expected Gemini skills path.