Add new OCPP 2.0.1 request handlers and client-side message functions

[MaheshSuthar119]

Summary

This PR introduces several enhancements to the OCPP 2.0.1 implementation by adding
server-side handlers in central_system.py and new client-side request functions
in charge_point.py. Additionally, a Dockerfile has been added to simplify deployment
and testing.

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🚀 New Features Added

✅ Server (Central System)

Implemented new OCPP message handlers:

• CancelReservation
• StatusNotification
• SecurityEventNotification
• Authorize
• MeterValues
• ReportChargingProfiles

These handlers return appropriate call_result.* responses and include basic logging.

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✅ Charge Point (Client)

Added new asynchronous methods to simulate Charge Point messages:

• send_boot_notification()
• send_heartbeat()
• send_cancel_reservation()
• send_status_notification()
• send_security_event_notification()
• send_meter_values()
• send_authorization()

These functions generate valid OCPP 2.0.1 requests and send them to the central system.

Also added:

• SampledValue and MeterValue dataclasses
• Utility method get_current_time()

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🐳 Docker Support

Added a Dockerfile to run the server or charge point in a containerized environment.

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📌 Motivation

This contribution enhances the OCPP 2.0.1 example implementation, making it easier to:

• Simulate a realistic EV charging ecosystem
• Test message flows between CSMS and EVSE
• Help developers understand how individual OCPP messages behave

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✔️ Tests

Tested locally by:

• Running the central system WebSocket server
• Connecting the ChargePoint client
• Verifying logs for all new request/response flows

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🙏 Notes

I am open to feedback and happy to make improvements if requested.

[MaheshSuthar119]

Hi @proelke and @mdwcrft,
I hope you're doing well.
Please let me know if I need to make any changes or improvements.
Thanks!