Updates to readme

[davidraker]

This pull request introduces several improvements and fixes to the BACnet Protocol Proxy library, focusing on documentation, dependency management, and error handling. The most significant changes are an expanded and reformatted README.md, the addition of a development dependencies section in pyproject.toml, and improved error handling in the BACnet protocol implementation.

Documentation improvements:

• Expanded and reformatted the README.md to include project badges, installation instructions, dependency information, development guidelines, and a disclaimer notice for clarity and professionalism.

Dependency management:

• Added a [tool.poetry.group.dev.dependencies] section in pyproject.toml to clarify that there are currently no additional development dependencies.

Error handling:

• Updated the write_property method in bacnet.py to return the exception object instead of printing it, improving error reporting and testability.

[davidraker]

Out of date. Making new PR.