docs(skills): cover skills.sh, well-known, and update flows

Document the expanded skills hub functionality, including:
- skills.sh source usage
- well-known endpoint discovery
- check/update commands
- real install/inspect examples
- accurate --force semantics and trust policy behavior

Also verified the docs site with a successful Docusaurus production build.

website/docs/getting-started/quickstart.md

@@ -141,10 +141,18 @@ The agent will set up a cron job that runs automatically via the gateway.
 
 ```bash
 hermes skills search kubernetes
+hermes skills search react --source skills-sh
+hermes skills search https://mintlify.com/docs --source well-known
 hermes skills install openai/skills/k8s
 hermes skills install official/security/1password
+hermes skills install skills-sh/vercel-labs/json-render/json-render-react --force
 ```
 
+Tips:
+- Use `--source skills-sh` to search the public `skills.sh` directory.
+- Use `--source well-known` with a docs/site URL to discover skills from `/.well-known/skills/index.json`.
+- Use `--force` only after reviewing a third-party skill. It can override non-dangerous policy blocks, but not a `dangerous` scan verdict.
+
 Or use the `/skills` slash command inside chat.
 
 ### Use Hermes inside an editor via ACP