feat: add bun-fullstack agent and update skills

.opencode/skills/tech-stack/elysiajs/examples/guard.ts

@@ -0,0 +1,34 @@
+import { Elysia, t } from 'elysia'
+
+new Elysia()
+	.state('name', 'salt')
+	.get('/', ({ store: { name } }) => `Hi ${name}`, {
+		query: t.Object({
+			name: t.String()
+		})
+	})
+	// If query 'name' is not preset, skip the whole handler
+	.guard(
+		{
+			query: t.Object({
+				name: t.String()
+			})
+		},
+		(app) =>
+			app
+				// Query type is inherited from guard
+				.get('/profile', ({ query }) => `Hi`)
+				// Store is inherited
+				.post('/name', ({ store: { name }, body, query }) => name, {
+					body: t.Object({
+						id: t.Number({
+							minimum: 5
+						}),
+						username: t.String(),
+						profile: t.Object({
+							name: t.String()
+						})
+					})
+				})
+	)
+	.listen(3000)