Add support for HACS (Home Assistant Community Store)

• Add support for HACS (Home Assistant Community Store) (fixes #7).
• Add support for All Contributors.
• Improve documentation.
• Expand issues and pull request templates.

Updated version for easier integration

• Reorganize component file structure to comply with Home Assistant's Great Migration initiative (fixes #2).
• Add support for Custom Updater (fixes #1).
• Version bump.

Production release

1.0.0

Production-level version