Add GitHub Copilot instructions for FalkorDBLite

[Copilot]

Configures .github/INSTRUCTIONS.md to provide GitHub Copilot with repository context and development workflows.

Changes

• Repository context: Overview of FalkorDBLite as embedded Redis+FalkorDB Python interface with key features
• Project structure: Component map (Redis client wrapper, FalkorDB graph client, configuration management)
• Development workflow: Setup steps, build process (Redis 8.2.2 compilation, FalkorDB v4.14.7 module), Python 3.12-3.14 support
• Testing & quality: pytest commands, coverage reporting, pylint/pycodestyle configuration
• CI/CD pipeline: Multi-platform testing (Ubuntu/macOS), linting, PyPI publishing via Trusted Publishing
• Common tasks: Adding FalkorDB features, updating versions, debugging with python -m redislite.debug
• Dependencies: Runtime (redis>=4.5, falkordb>=1.2.0, psutil) and development (pytest, pylint) packages

The instructions enable Copilot to provide contextual assistance for graph database operations, embedded server management, and multi-version Python packaging.

Original prompt

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This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions</issue_title>
<issue_description>Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository.

</issue_description>

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

• Fixes ✨ Set up Copilot instructions #32

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

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