Persist creds to a separate file

[ericsciple]

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[Copilot]

Pull Request Overview

This PR refactors Git credential management to persist credentials in a separate config file instead of directly in the repository's .git/config. The change improves security by isolating credentials from the main Git configuration and uses Git's includeIf mechanism to conditionally include the credentials when needed.

Key changes:

• Moves credential storage from .git/config to a separate file in RUNNER_TEMP
• Uses Git's includeIf.gitdir feature to conditionally include credentials based on Git directory path
• Updates both main repository and submodule authentication to use the new approach

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/git-command-manager.ts	Adds new methods for config file operations and configFile parameter support
src/git-auth-helper.ts	Refactors credential management to use separate config files with includeIf entries
test/verify-submodules-true.sh	Updates test to use --includes flag when checking for credentials
test/verify-submodules-recursive.sh	Updates test to use --includes flag when checking for credentials
test/git-directory-helper.test.ts	Adds mock implementations for new git command manager methods
test/git-auth-helper.test.ts	Updates tests to verify new credential file structure and behavior
.github/workflows/test.yml	Adjusts workflow paths to avoid conflicts with new checkout behavior

Comments suppressed due to low confidence (1)

src/git-auth-helper.ts:1

• The test name configureAuth_AcceptsGitHubServerUrlSetToGHEC doesn't match the test description 'inject https://github.com as github server url'. Consider using a more descriptive name like configureAuth_AcceptsGitHubServerUrl to match the actual test purpose.

import * as assert from 'assert'

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