Evaluate an expression against the sample GitHub context:
```powershell
cargo run -- eval --expr "contains(github.event.issue.labels.*.name, 'bug')" --github-context examples/github-context.json
```
Render a template:
```powershell
cargo run -- template --template 'deploy-${{ github.ref_name }}-${{ github.sha }}' --github-context examples/github-context.json
```
Evaluate `hashFiles()`:
```powershell
cargo run -- eval --expr "hashFiles('Cargo.lock') != ''" --workspace .
```