feat(inputs): add option to disable the post action

[zekth]

Add an option to disable the post-hook of checkout. This will enable people to run private github actions within other workflows without having to hack around like this:

#1149 (comment)

fixes: #1149
fixes: #2164

[Copilot]

Pull Request Overview

This PR adds a new skip-cleanup input option to the checkout action that allows users to disable the post-action cleanup phase. This enables running private GitHub actions within other workflows without requiring workarounds.

• Added skip-cleanup boolean input parameter with default value of false
• Updated the cleanup function to conditionally skip cleanup based on the new setting
• Extended the IGitSourceSettings interface to include the skipCleanup property

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
action.yml	Adds the new skip-cleanup input parameter definition
src/git-source-settings.ts	Extends interface to include skipCleanup boolean property
src/main.ts	Implements conditional cleanup logic based on the new setting