feat: add bun-fullstack agent and update skills

.agent/skills/tech-stack/elysiajs/plugins/static.md

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+# Static Plugin
+This plugin can serve static files/folders for Elysia Server
+
+## Installation
+```bash
+bun add @elysiajs/static
+```
+
+## Basic Usage
+```typescript twoslash
+import { Elysia } from 'elysia'
+import { staticPlugin } from '@elysiajs/static'
+
+new Elysia()
+    .use(staticPlugin())
+    .listen(3000)
+```
+
+By default, the static plugin default folder is `public`, and registered with `/public` prefix.
+
+Suppose your project structure is:
+```
+| - src
+  | - index.ts
+| - public
+  | - takodachi.png
+  | - nested
+    | - takodachi.png
+```
+
+The available path will become:
+- /public/takodachi.png
+- /public/nested/takodachi.png
+
+## Config
+Below is a config which is accepted by the plugin
+
+### assets
+@default `"public"`
+
+Path to the folder to expose as static
+
+### prefix
+@default `"/public"`
+
+Path prefix to register public files
+
+### ignorePatterns
+@default `[]`
+
+List of files to ignore from serving as static files
+
+### staticLimit
+@default `1024`
+
+By default, the static plugin will register paths to the Router with a static name, if the limits are exceeded, paths will be lazily added to the Router to reduce memory usage.
+Tradeoff memory with performance.
+
+### alwaysStatic
+@default `false`
+
+If set to true, static files path will be registered to Router skipping the `staticLimits`.
+
+### headers
+@default `{}`
+
+Set response headers of files
+
+### indexHTML
+@default `false`
+
+If set to true, the `index.html` file from the static directory will be served for any request that is matching neither a route nor any existing static file.
+
+## Pattern
+Below you can find the common patterns to use the plugin.
+
+## Single file
+Suppose you want to return just a single file, you can use `file` instead of using the static plugin
+```typescript
+import { Elysia, file } from 'elysia'
+
+new Elysia()
+    .get('/file', file('public/takodachi.png'))
+```