Feature: supports dynamic interface switching

[hideakitai]

Related:

• Choosing between WiFi and Ethernet during runtime #128
• Refactor: network related abstraction #142

[Copilot]

Pull Request Overview

Adds runtime-polymorphic interfaces (Sender/Receiver/Manager traits) to allow dynamic switching between network interfaces (WiFi/Ethernet) and simultaneous multi-interface usage. Updates examples, CI, version, and documentation accordingly.

• Introduces interface trait headers (SenderTraits, ReceiverTraits, ManagerTraits) and integrates them into Sender/Receiver/Manager classes.
• Adds new Multiple examples (switch_interface, send_receive) plus CI job to compile them.
• Bumps version to 0.9.0 and tightens ArxTypeTraits dependency; updates README with multi-interface guidance.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
library.properties	Version bump and dependency minimum version added.
library.json	Mirrors version/dependency updates.
examples/Multiple/switch_interface/switch_interface.ino	New example demonstrating runtime interface switching.
examples/Multiple/send_receive/send_receive.ino	New example using WiFi and Ethernet concurrently.
README.md	Documents multi-interface support.
Artnet/SenderTraits.h	Adds sender interface trait (runtime polymorphism).
Artnet/Sender.h	Adapts Sender to new trait, adds optional port parameter.
Artnet/ReceiverTraits.h	Adds receiver interface trait.
Artnet/Receiver.h	Conforms to trait interface; replaces templated subscribe helpers with typed callbacks.
Artnet/ManagerTraits.h	Defines combined manager interface.
Artnet/Manager.h	Manager now implements new IManager interface; minor refactor.
.github/workflows/build.yml	Adds CI job to build new Multiple examples on several boards.

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