docs(README): Add usage_example in README

[Dexter9532]

closes #40

[mirzak]

Since we intend to publish to PyPi, we need to keep in mind that the README.md will be displayed on the front page. This means that it should be user facing.

See https://pypi.org/project/python-can/ for reference.

[mirzak]

This has a "generated by AI" smell to it (with all the icons and the superfluous text).

Lets keep it simple, and do the following:

in DEVELOPMENT.MD put the existing README (as-is).

In README.md write,

## python-em511

python-em511 provides a simple, Pythonic interface for reading and writing data 
from Carlo Gavazzi EM511 series energy meters over Modbus RTU. It builds on top 
of [pymodbus](https://pypi.org/project/pymodbus/).

## Example usage:

```python
from em511 import Em511
from pymodbus.client import ModbusSerialClient

# Configure the Modbus client
client = ModbusSerialClient(
   port="COM3",  # or "/dev/ttyUSB0" on Linux
   baudrate=9600,
   parity="E",
   stopbits=1,
   bytesize=8,
   # datasheet specifies maximum response timeout of 500ms (typical 40ms)
   timeout=0.5,
)

# Device Modbus address
device_address = 1

# Initialize the EM511 driver
meter = Em511(device_address=device_address, client=client)

# Read voltage
voltage = meter.V
print(f"Voltage: {voltage} V")

# Example of writing a password-protected parameter
meter.password = 1234
```

## Report issues

If you run into problems, you can ask for help in our [issue tracker](https://github.com/id8-engineering/python-em511/issues) on GitHub.

## Contributing

See [CONTRIBUTING.MD](https://github.com/id8-engineering/python-em511/blob/main/CONTRIBUTING.MD) and >[DEVELOPMENT.MD](https://github.com/id8-engineering/python-em511/blob/main/DEVELOPMENT.MD).

[Dexter9532]

this is AI who helped us, when i watch other READMEs this is how they do it
https://www.lazyvim.org/
this is and example

[mirzak]

And squash commits.