fix: allow --variable-type flag to support multiple selections

[SakshiKoli-CS]

No description provided.

[Copilot]

Pull Request Overview

This PR enables the --variable-type flag in the launch command to accept multiple selections, allowing users to combine different environment variable import methods (e.g., importing from a stack while also manually adding variables).

Key Changes

• Updated the --variable-type flag definition to support multiple values with the multiple: true property
• Added a new usage example demonstrating how to specify multiple --variable-type flags
• Expanded test coverage with new test cases for various combinations of variable type selections
• Added AGENTS.md file with testing guidelines for the project

Reviewed Changes

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

File	Description
src/commands/launch/index.ts	Added multiple: true to the --variable-type flag definition and updated the description to clarify that the flag can be specified multiple times. Added a new example demonstrating multiple flag usage.
src/adapters/base-class.test.ts	Added comprehensive test cases for handling multiple variable type selections, including combinations of two options, all three options, and edge cases for the "Skip" option validation.
AGENTS.md	New file containing testing guidelines and best practices for writing unit tests in the project.

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[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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