Machine registry improvements (#10150)

* Add wrapper function for machine registry

* Decorate entrypoint functions

* Docstrings

* Fix for boolean setting

* Add playwright tests

* Use proper entrypoints

* Ensure settings are fetched correctly

* Prevent recursion of machine registry decorator

* Fix machine status display

* Enhanced warning msg

* Add simple machine sample printer

* Adds playwright tests for machine UI

* re-throw exception

* Define 'machine' plugin mixin class

* Adjust machine discovery

* Use plugin mixins for registering machine types and drivers

* Adjust unit test

* Remove plugin static files when deactivating

* Force machine reload when plugin registry changes

* Add plugins specific to testing framework

* Add test for plugin loading sequence

* Add session caching

- Significantly reduce DB hits

* Enhanced unit testing and test plugins

* Refactor unit tests

* Further unit test fixes

* Adjust instance rendering

* Display table of available drivers

* Cleanup

* ADjust unit test

* Tweak unit test

* Add docs on new mixin type

* Tweak machine overview docs

* Tweak playwright tests

* Additional unit test

* Add unit test for calling machine func

* Enhanced playwright tests

* Account for database not being ready

docs/docs/settings/error_codes.md

@@ -75,6 +75,11 @@ A plugin is not allowed to override a *final method* from the `InvenTreePlugin`
 
 This is a security measure to prevent plugins from changing the core functionality of InvenTree. The code of the plugin must be changed to not override functions that are marked as *final*.
 
+#### INVE-E12
+**Plugin returned invalid machine type - Backend**
+
+An error occurred when discovering or initializing a machine type from a plugin. This likely indicates a faulty or incompatible plugin.
+
 ### INVE-W (InvenTree Warning)
 Warnings - These are non-critical errors which should be addressed when possible.