Refactor docs

mkdocs-website/docs/en/development/changes_logging.md

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+### Logging
+
+Logging in v2 was confusing as both application logs and system (internal) logs
+were using the same logger. We have simplified this as follows:
+
+- Internal logs are now handled using the standard Go `slog` logger. This is
+  configured using the `logger` option in the application options. By default,
+  this uses the [tint](https://github.com/lmittmann/tint) logger.
+- Application logs can now be achieved through the new `log` plugin which
+  utilises `slog` under the hood. This plugin provides a simple API for logging
+  to the console. It is available in both Go and JS.