feat: add pnpm setup step for GitHub Actions workflows #170
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Description
This PR adds support for automatically setting up pnpm in GitHub Actions workflows when a project uses pnpm as its package manager.
Changes
PnpmSetupStepclass: A pipeline step that uses thepnpm/action-setupGitHub Action to install and configure pnpm before running install commandsPnpmSetupStepOptionsinterface: Configuration options for the pnpm setup step, including an optional version parameter (defaults to '9')PnpmSetupStepis automatically injected into the install step sequence when:pnpm addcommand in the CDK pipeline base classImplementation Details
CDKPipeline.provideInstallStep()PnpmSetupStepOptions, with a sensible default of version '9'to*()methodsTesting
The changes ensure that pnpm projects will have pnpm properly installed and available in their GitHub Actions workflows before any package installation commands are executed.