feat(logging): add LogManager.extend() for custom driver registration

[anilcancakir]

Closes #33

Summary

• Add LogManager.extend(name, factory) for custom LoggerDriver registration
• Custom drivers checked before built-in switch in _resolveChannel()
• Custom drivers can override built-ins and be included in stack channels
• LogManager.resetDrivers() for test cleanup (static registry)
• Follows same extend() pattern as AuthManager.extend()

Usage

// In ServiceProvider boot()
LogManager.extend('sentry', (config) => SentryLoggerDriver(
  minLevel: config['level'] ?? 'warning',
));

Test plan

• extend() registers custom driver factory
• Custom driver receives channel config map
• Custom driver overrides built-in (e.g., 'console')
• Stack driver includes custom channels
• Full test suite: 700 tests pass
• dart analyze: zero warnings

[sentry]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

This PR adds extension points to the Magic framework’s logging and networking subsystems, enabling app-level customization (custom LoggerDriver registration and direct Dio configuration) while keeping config-driven resolution intact.

Changes:

• Add LogManager.extend() (static registry) to register custom LoggerDriver factories, resolved before built-in drivers.
• Add DioNetworkDriver.configureDriver() to expose the underlying Dio instance for SDK/plugin integration.
• Add tests + docs + changelog entries covering both extension hooks.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
lib/src/logging/log_manager.dart	Adds static custom-driver registry (extend/resetDrivers) and resolves custom drivers before built-ins.
lib/src/network/drivers/dio_network_driver.dart	Adds configureDriver() hook to mutate the underlying Dio instance.
test/logging/logging_test.dart	Adds coverage for LogManager.extend() behavior (config passed, overrides built-ins, stack inclusion).
test/network/network_test.dart	Adds coverage for DioNetworkDriver.configureDriver() invocation behavior.
doc/digging-deeper/logging.md	Updates custom driver registration docs to use LogManager.extend().
doc/basics/http-client.md	Documents the new configureDriver() plugin hook usage.
skills/magic-framework/references/secondary-systems.md	Adds reference docs for custom log drivers + example config.
skills/magic-framework/references/http-network.md	Adds reference docs for the Dio driver plugin hook.
CHANGELOG.md	Records both features under Unreleased.