docs(examples): 索引里补上 09

Author: speak-agent

docs/01-examples.md

@@ -27,6 +27,7 @@ examples.
 | 02 | [`examples/02-with-deps`](../examples/02-with-deps/) | Adds the `mcpplibs.cmdline` dependency to parse command-line arguments | `[dependencies]`, SemVer, `mcpp.lock` |
 | 03 | [`examples/03-pack-static`](../examples/03-pack-static/) | Produces a fully static release package via `mcpp pack --mode static` | `[target.<triple>]` and `[pack]` configuration |
 | 08 | [`examples/08-build-rules`](../examples/08-build-rules/) | Two rule packages and a project that uses both | `host-module = true`, `[build-dependencies]`, `mcpp::action` with `role = "check"` |
+| 09 | [`examples/09-graphics-stack`](../examples/09-graphics-stack/) | KMS/DRM -> GBM -> EGL, plus Wayland, with nothing from the host | `compat.libgbm` / `libdrm` / `egl` / `wayland`, SubOS-supplied `GBM_BACKENDS_PATH` |
 
 ## Suggested Reading Order
 

docs/zh/01-examples.md

@@ -24,6 +24,7 @@ mcpp build && mcpp run
 | 02 | [`examples/02-with-deps`](../../examples/02-with-deps/) | 引入依赖 `mcpplibs.cmdline` 解析命令行参数 | `[dependencies]`、SemVer、`mcpp.lock` |
 | 03 | [`examples/03-pack-static`](../../examples/03-pack-static/) | 通过 `mcpp pack --mode static` 生成全静态发布包 | `[target.<triple>]` 与 `[pack]` 配置 |
 | 08 | [`examples/08-build-rules`](../../examples/08-build-rules/) | 两个规则包,以及同时用到它们的工程 | `host-module = true`、`[build-dependencies]`、`role = "check"` 的 `mcpp::action` |
+| 09 | [`examples/09-graphics-stack`](../../examples/09-graphics-stack/) | KMS/DRM -> GBM -> EGL 加 Wayland,不碰宿主的任何东西 | `compat.libgbm` / `libdrm` / `egl` / `wayland`、由 SubOS 提供的 `GBM_BACKENDS_PATH` |
 
 ## 推荐阅读顺序