Enhancements for Developer Contribution Experience

[thatvideoshopguy]

Overview

This pull request introduces a series of updates to improve the developer experience and streamline the contribution workflow for the Spreadsheet Forms project.

Changes Included

• Markdown Linting: The CHANGELOG has been linted to adhere to proper markdown syntax, ensuring readability and consistency.
• Gitignore Update: Incorporated the official Python .gitignore from GitHub to keep our repository clean from common unnecessary file tracking.
• Missing Matrix: Modified lint.yml to include a matrix strategy for multiple Python versions, ensuring our codebase integrity across environments.
• LibreOffice Docker Integration: I added a Linuxserver.io Docker image for LibreOffice, allowing developers without access to Excel to view pytest output spreadsheets.
• Sphinx-autobuild: Integrated sphinx-autobuild into our development dependencies for real-time feedback when editing documentation.
• README Refinement: Refined the README.md to provide more straightforward setup instructions.

Testing and Verification

• Verify the CHANGELOG format for consistency.
• Pull the branch and check that the .gitignore behaves as expected.
• Run the GitHub Actions workflow to ensure the Python version matrix functions correctly.
• Utilise the LibreOffice Docker container to open and inspect spreadsheet outputs.
• Test the sphinx-autobuild for live documentation updates.
• Follow the updated README.md to set up a fresh development environment.