feat: add bun-fullstack agent and update skills

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

@@ -0,0 +1,32 @@
+import { Elysia, t } from 'elysia'
+
+// ? Elysia#83 | Proposal: Standardized way of renaming third party plugin-scoped stuff
+// this would be a plugin provided by a third party
+const myPlugin = new Elysia()
+	.decorate('myProperty', 42)
+	.model('salt', t.String())
+
+new Elysia()
+	.use(
+		myPlugin
+			// map decorator, rename "myProperty" to "renamedProperty"
+			.decorate(({ myProperty, ...decorators }) => ({
+				renamedProperty: myProperty,
+				...decorators
+			}))
+			// map model, rename "salt" to "pepper"
+			.model(({ salt, ...models }) => ({
+				...models,
+				pepper: t.String()
+			}))
+			// Add prefix
+			.prefix('decorator', 'unstable')
+	)
+	.get(
+		'/mapped',
+		({ unstableRenamedProperty }) => unstableRenamedProperty
+	)
+	.post('/pepper', ({ body }) => body, {
+		body: 'pepper',
+		// response: t.String()
+	})