fix(script_new): incompatibility with gpt-5 json schema requirements

[marc-romu]

Description

Fixes small json schema request issue with gpt-5 models in scritp_new tool.

Breaking Changes

None.

Testing Done

RH8.21 on windows.

Checklist

• This PR is focused on a single feature or bug fix
• Version in Solution.props was updated, if necessary, and follows semantic versioning
• CHANGELOG.md has been updated
• PR title follows Conventional Commits format
• PR description follows Pull Request Description Template

[github-actions]

🏷️ This PR has been automatically assigned to milestone 0.5.3-alpha based on the version in Solution.props.

[Copilot]

Pull Request Overview

Fixes a JSON schema validation issue in the script_new AI tool where required fields were incomplete, causing problems with GPT-5 model requests.

• Updated JSON schema to include all required fields (description and access) for proper validation
• Incremented version from 0.5.2-alpha to 0.5.3-alpha
• Added new AI tool entry in documentation

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/SmartHopper.Core.Grasshopper/AITools/script_new.cs	Fixed JSON schema by adding missing required fields for input and output parameters
Solution.props	Bumped version to 0.5.3-alpha
README.md	Updated version badge and added new gh_connect tool entry
CHANGELOG.md	Added changelog entry for the schema fix
.github/labels.yml	Added label for new AI GhConnect component

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}