chore: bump mcpp to 0.0.11 + add mcpp usage to README

- .xlings.json: mcpp 0.0.8 → 0.0.11
- CI: mcpp 0.0.11
- README: add mcpp build/usage section

Author: Sunrisepeak

.github/workflows/ci.yml

@@ -23,17 +23,17 @@ jobs:
           "/tmp/xlings-${XLINGS_VERSION}-linux-x86_64/subos/default/bin/xlings" self install
           echo "$HOME/.xlings/subos/current/bin" >> "$GITHUB_PATH"
 
-      - name: Install workspace tools (.xlings.json → mcpp 0.0.8)
+      - name: Install workspace tools (.xlings.json → mcpp 0.0.11)
         run: xlings install -y
 
       # Cache mcpp's self-bootstrapped sandbox (musl-gcc + binutils +
       # glibc + ninja + patchelf, ~800 MB). Toolchain set is pinned by
-      # mcpp 0.0.8, so a fixed key suffices.
+      # mcpp 0.0.11, so a fixed key suffices.
       - name: Cache mcpp sandbox
         uses: actions/cache@v4
         with:
-          path: ~/.xlings/data/xpkgs/xim-x-mcpp/0.0.8/registry
-          key: mcpp-sandbox-${{ runner.os }}-mcpp0.0.8
+          path: ~/.xlings/data/xpkgs/xim-x-mcpp/0.0.11/registry
+          key: mcpp-sandbox-${{ runner.os }}-mcpp0.0.11
 
       - name: Build with mcpp
         run: mcpp build

.xlings.json

@@ -1,5 +1,5 @@
 {
   "workspace": {
-    "mcpp": { "linux": "0.0.8" }
+    "mcpp": { "linux": "0.0.11" }
   }
 }

README.md

@@ -116,6 +116,34 @@ target("myapp")
     set_policy("build.c++.modules", true)
 ```
 
+### mcpp
+
+#### 添加依赖
+
+```bash
+mcpp add mcpplibs.capi:lua@0.0.3
+```
+
+或在 `mcpp.toml` 中手动添加：
+
+```toml
+[dependencies]
+"mcpplibs.capi:lua" = "0.0.3"
+```
+
+#### 构建
+
+```bash
+mcpp build
+```
+
+#### 代码示例
+
+```cpp
+import mcpplibs.capi.lua;
+// ... 参见上方"快速开始"
+```
+
 ## 覆盖范围
 
 封装了 Lua 5.4 C API 的核心功能：