chore: Add testing and corresponding CIs

[mrzimu]

This pull request introduces automated workflows for testing and PR title linting, improves development dependency management, and adds basic test coverage for the project. The main changes are grouped below by theme.

Continuous Integration and Workflow Automation:

• Added a nightly test workflow (.github/workflows/nightly-test.yml) to run package tests automatically every day and on manual or workflow calls.
• Introduced a reusable test workflow (.github/workflows/test-package.yml) that tests the package across multiple Python versions and operating systems on push, pull request, and manual triggers.

Pull Request Quality Assurance:

• Added a PR title linter workflow (.github/workflows/semantic-pr-titles.yml) to enforce semantic PR titles when PRs are opened, edited, or reopened.

Development Environment Improvements:

• Defined an optional dev dependency group with pytest in pyproject.toml for easier installation of development dependencies.

Testing:

• Added basic tests in tests/test_project.py for streamer overrides and object arrays using the test ROOT file, improving initial test coverage.