Add jq feature

[Copilot]

Adds a jq devcontainer feature that installs the jq JSON processor via the system package manager (apt-get).

Changes

• src/jq/devcontainer-feature.json — Feature manifest; includes a version option as a placeholder following repo convention
• src/jq/install.sh — APT-based install (same pattern as mosh.org)
• src/jq/README.md — Auto-generated style README
• test/jq/test.sh — Verifies jq --version succeeds
• .github/workflows/test.yaml — Added jq to both test-autogenerated and test-scenarios CI matrices

Usage

"features": {
    "ghcr.io/devcontainer-community/devcontainer-features/jq:1": {}
}

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add jq feature</issue_title>
<issue_description>build on implementation in #104 </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add jq feature #121

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